This is a timeline I wrote some years ago, influenced by GURPS Alternate Earths. Please note that some events were designed with the goal of mirroring OTL events, i.e. their actual probability would be rather low. But on the other hand, OTL is full of improbable events 
So enjoy Wilhelm’s World!
1915: The German Emperor Wilhelm II. prohibits that unrestricted submarine warfare is declared by the German admiralty. Several U-boat captains that violate this special order are put on trial and executed under German military law.
1916: Neutrality Act. The USA declare that they will never enter into a conflict takes place outside of the Americas. Actually, this is understood as a new interpretation and extension of the Monroe Doctrine that is repeated at the same time. At several occasions, Royal Navy vessels as well as German U-boats are asked by US forces to leave a 200-mile “security zone” declared by the US government off the American coasts.
1917: Weakened by a communist revolution, Russia surrenders to the Central Powers. The treaty of Brest-Litowsk is signed. The Ukraine and Poland are granted independence. Both remain under German influence as buffer states separating Germany and Russia. Corn supplies from the Ukraine start to improve the German food situation. Italy starts secret negotiations with the Central Powers for a separate peace. A respective treaty is signed in early 1918, resulting in restoration of the pre-war situation.
1918: German reserves are shifted to the Western Front. The lack of US troops and supplies can be felt to the disadvantage of the Entente. The French troops are severely weakened by large scale mutinies and communist uprisings that are only put down with a high toll by loyal forces under Petain. In November, France and the UK ask for peace and finally accept a treaty (peace of Potsdam). The remainder of Lorraine is ceded to Germany, parts of Belgium are annexed. Substantial reparations must be paid by the Entente powers. Parts of the British and French colonies must be surrendered to Germany (Kenya, the remainder of Cameroon, Western Africa, Hong Kong, Polynesia including Tahiti). Serbia is annexed by Austria-Hungary. Japan gives back the occupied German colonies in the East in fear of provoking victorious Germany. However, Tsingtao is sold to Japan for a nominal price.
1919: The Royal Navy voluntarily scuttles its ships close to Heligoland (it had been interned there since the end of the hostilities) in order to avoid handing it over to Germany. An influenza epidemic results in millions of deaths all over the world. Further communist uprisings occur in France. Soviet republics continue to survive until 1922 in some regions, especially Marseilles and Toulon (fleet mutiny), nationalist and communist troops battle all over France. In 1923, the communist party is prohibited, many communists are imprisoned, some even executed for treason. Ireland becomes an independent republic in 1923.
1924: Mussolini takes over government in Italy as head of the Fascist movement.
1927: Extreme nationalists attempt a coup in Berlin, take hostages in the Reichstag. The attempt very soon collapses due to army intervention. The leader, a former Austrian-born corporal with the name of Adolf Hitler, is tried and executed for treason. Various other participants are either imprisoned for long terms or deported to the Pacific colonies.
1929: The world economic crisis culminates in the almost simultaneous crashes of the stock exchanges of New York and Berlin. In Germany, numerous mega-mergers are caused by this event. German super-corporations are created in the metal and chemical industry (Deutsche Metallaktiengesellschaft, IG Farben AG, and others).
1932: Kaiser Wilhelm II. dies of old age. His son becomes Kaiser Wilhelm III.
1934: The first regular transatlantic airship line is set up between Berlin and New York using giant zeppelins filled with helium.
1937: The Japanese influence in China continues to grow. Manchukuo is annexed, later Nanking.
1938: In France, a Nationalist government under de Gaulle is elected. Substantial rearmament follows, and an alliance with Italy.
1940: In a surprise movement, French forces enter into Belgium and Alsace-Lorraine. Substantial territorial gains follow, also caused by the first time use of a modern and powerful air force. Bombardments of German troops and fortifications are highly successful and cause a general retreat. Only on the Eastern side of the Rhine, the German army is able to stop the French advance and to establish a defensive position. Italy declares war on Austria. An air attack on the port of Triest disables almost the whole Austrian battle fleet. Italian armored special forces excel in combat in the Alps. England, the Soviet Union, the Ukraine and Poland stay neutral. French submarines and cruisers are actively attacking German merchant shipping all over the world. The heavy cruiser „Jean Bart“ sinks itself near Cape Town after a battle against a German squadron.
1941: French troops cross the Rhine in three places, but are unable to advance beyond their bridgeheads. German reserves are moved in from the Eastern border via train.
1942: The Imperial German Navy manages to land strong tank armies in the Normandy, thus opening a second front. German troops, including paratroopers, advance via Paris with terrible losses on both sides. Growing tensions between Japan and the USA (Philippines quarrel) result in a declaration of war by Japan and a surprise attack on the Philippines. The Western US Pacific Fleet is destroyed in port.
1943: The war in Europe has once again degenerated into trench warfare. Artillery duels and bomber raids are almost the only activities. Numerous cities in Eastern France and Western Germany are destroyed by fighting or air raids. Among the buildings that are destroyed and lost forever are Notre Dame and the Eiffel Tower, but also the Cologne Cathedral and the Kaiserpfalz of Aachen.
1944: After British negotiations, the peace treaty of London is signed. Generally speaking, the borders of 1940 are confirmed, and French disarmament is enforced. The DeGaulle government resigns and a socialist government wins the following elections. Foundation of the International Council with its seat in Lausanne. Largest naval battle of the history close to the coast of Formosa. The US emerge victorious, but suffer tremendous losses. US generals Patton, MacArthur and Eisenhower reconquer the Philippines.
1945: Japan and the USA sign a peace treaty; spheres of influence are also agreed.
1947: Indian is transformed to a Dominion similar to Canada. Gandhi becomes the first prime minister.
1949: The Philippines become a US State.
1951: The German crown prince Friedrich marries Elisabeth, the British crown princess.
1956: The German Empire detonates the first nuclear bomb on its testing ground in the Bismarck archipelago. The „saturation speech“ of Kaiser Wilhelm III. follows (Germany will never again begin a war, and it has acquired all territory that it wanted).
1957: Beginning of colonial uprisings in French African colonies.
1958: Mau-Mau- uprising in German East Africa.
1959: Germany starts to grant independence to its African colonies with the exception of German South West Africa due to rather large German settlement.
1960: The USA and Mexico establish a joint economic zone. The USA detonate a nuclear bomb in the desert of New Mexico.
1961: Japan explodes a nuclear bomb in the Pacific Ocean. Cold War Japan - USA. Growing economic tensions USA – Japan - Germany (high customs duties, import restrictions, etc.).
1963: Rebellion in Muslim parts of India. Independence of Pakistan and Bangladesh.
1965: Led by the German Reich, the Pact of Europe is signed in Hamburg. Founding members are Germany, Austria-Hungary, Poland, Denmark, the Netherlands, Belgium, Great Britain, Romania. Customs borders and travel restrictions are removed.
1970: The Philippines crisis. President Kennedy orders the stationing of nuclear missiles. The world is at the brink of a nuclear war, as Japan demands that the missiles are removed. Under negotiation of the German Empire and the International Council, the crisis is solved.
1972: After having lost almost all ist colonies, France joins the Pact of Europe.
1968: Kaiser Friedrich IV. is crowned. This results in the unification of the United Kingdom and the German Empire under one crown. Two seats of government are established, in London and in Berlin.
1974: Spain, Bulgaria and Portugal become members of the European Pact.
1976: The satellite „Trabant 1“ (Germany) is the first artificial object in space.
1978: Pact of Europe is extended with a joint military alliance.
1982: The US astronaut Robert L. Young is the first human in space. Beginning of the space race for the moon.
1987: The German Empire puts the first man on the moon. The landing craft is named Adler (eagle).
So enjoy Wilhelm’s World!
1915: The German Emperor Wilhelm II. prohibits that unrestricted submarine warfare is declared by the German admiralty. Several U-boat captains that violate this special order are put on trial and executed under German military law.
1916: Neutrality Act. The USA declare that they will never enter into a conflict takes place outside of the Americas. Actually, this is understood as a new interpretation and extension of the Monroe Doctrine that is repeated at the same time. At several occasions, Royal Navy vessels as well as German U-boats are asked by US forces to leave a 200-mile “security zone” declared by the US government off the American coasts.
1917: Weakened by a communist revolution, Russia surrenders to the Central Powers. The treaty of Brest-Litowsk is signed. The Ukraine and Poland are granted independence. Both remain under German influence as buffer states separating Germany and Russia. Corn supplies from the Ukraine start to improve the German food situation. Italy starts secret negotiations with the Central Powers for a separate peace. A respective treaty is signed in early 1918, resulting in restoration of the pre-war situation.
1918: German reserves are shifted to the Western Front. The lack of US troops and supplies can be felt to the disadvantage of the Entente. The French troops are severely weakened by large scale mutinies and communist uprisings that are only put down with a high toll by loyal forces under Petain. In November, France and the UK ask for peace and finally accept a treaty (peace of Potsdam). The remainder of Lorraine is ceded to Germany, parts of Belgium are annexed. Substantial reparations must be paid by the Entente powers. Parts of the British and French colonies must be surrendered to Germany (Kenya, the remainder of Cameroon, Western Africa, Hong Kong, Polynesia including Tahiti). Serbia is annexed by Austria-Hungary. Japan gives back the occupied German colonies in the East in fear of provoking victorious Germany. However, Tsingtao is sold to Japan for a nominal price.
1919: The Royal Navy voluntarily scuttles its ships close to Heligoland (it had been interned there since the end of the hostilities) in order to avoid handing it over to Germany. An influenza epidemic results in millions of deaths all over the world. Further communist uprisings occur in France. Soviet republics continue to survive until 1922 in some regions, especially Marseilles and Toulon (fleet mutiny), nationalist and communist troops battle all over France. In 1923, the communist party is prohibited, many communists are imprisoned, some even executed for treason. Ireland becomes an independent republic in 1923.
1924: Mussolini takes over government in Italy as head of the Fascist movement.
1927: Extreme nationalists attempt a coup in Berlin, take hostages in the Reichstag. The attempt very soon collapses due to army intervention. The leader, a former Austrian-born corporal with the name of Adolf Hitler, is tried and executed for treason. Various other participants are either imprisoned for long terms or deported to the Pacific colonies.
1929: The world economic crisis culminates in the almost simultaneous crashes of the stock exchanges of New York and Berlin. In Germany, numerous mega-mergers are caused by this event. German super-corporations are created in the metal and chemical industry (Deutsche Metallaktiengesellschaft, IG Farben AG, and others).
1932: Kaiser Wilhelm II. dies of old age. His son becomes Kaiser Wilhelm III.
1934: The first regular transatlantic airship line is set up between Berlin and New York using giant zeppelins filled with helium.
1937: The Japanese influence in China continues to grow. Manchukuo is annexed, later Nanking.
1938: In France, a Nationalist government under de Gaulle is elected. Substantial rearmament follows, and an alliance with Italy.
1940: In a surprise movement, French forces enter into Belgium and Alsace-Lorraine. Substantial territorial gains follow, also caused by the first time use of a modern and powerful air force. Bombardments of German troops and fortifications are highly successful and cause a general retreat. Only on the Eastern side of the Rhine, the German army is able to stop the French advance and to establish a defensive position. Italy declares war on Austria. An air attack on the port of Triest disables almost the whole Austrian battle fleet. Italian armored special forces excel in combat in the Alps. England, the Soviet Union, the Ukraine and Poland stay neutral. French submarines and cruisers are actively attacking German merchant shipping all over the world. The heavy cruiser „Jean Bart“ sinks itself near Cape Town after a battle against a German squadron.
1941: French troops cross the Rhine in three places, but are unable to advance beyond their bridgeheads. German reserves are moved in from the Eastern border via train.
1942: The Imperial German Navy manages to land strong tank armies in the Normandy, thus opening a second front. German troops, including paratroopers, advance via Paris with terrible losses on both sides. Growing tensions between Japan and the USA (Philippines quarrel) result in a declaration of war by Japan and a surprise attack on the Philippines. The Western US Pacific Fleet is destroyed in port.
1943: The war in Europe has once again degenerated into trench warfare. Artillery duels and bomber raids are almost the only activities. Numerous cities in Eastern France and Western Germany are destroyed by fighting or air raids. Among the buildings that are destroyed and lost forever are Notre Dame and the Eiffel Tower, but also the Cologne Cathedral and the Kaiserpfalz of Aachen.
1944: After British negotiations, the peace treaty of London is signed. Generally speaking, the borders of 1940 are confirmed, and French disarmament is enforced. The DeGaulle government resigns and a socialist government wins the following elections. Foundation of the International Council with its seat in Lausanne. Largest naval battle of the history close to the coast of Formosa. The US emerge victorious, but suffer tremendous losses. US generals Patton, MacArthur and Eisenhower reconquer the Philippines.
1945: Japan and the USA sign a peace treaty; spheres of influence are also agreed.
1947: Indian is transformed to a Dominion similar to Canada. Gandhi becomes the first prime minister.
1949: The Philippines become a US State.
1951: The German crown prince Friedrich marries Elisabeth, the British crown princess.
1956: The German Empire detonates the first nuclear bomb on its testing ground in the Bismarck archipelago. The „saturation speech“ of Kaiser Wilhelm III. follows (Germany will never again begin a war, and it has acquired all territory that it wanted).
1957: Beginning of colonial uprisings in French African colonies.
1958: Mau-Mau- uprising in German East Africa.
1959: Germany starts to grant independence to its African colonies with the exception of German South West Africa due to rather large German settlement.
1960: The USA and Mexico establish a joint economic zone. The USA detonate a nuclear bomb in the desert of New Mexico.
1961: Japan explodes a nuclear bomb in the Pacific Ocean. Cold War Japan - USA. Growing economic tensions USA – Japan - Germany (high customs duties, import restrictions, etc.).
1963: Rebellion in Muslim parts of India. Independence of Pakistan and Bangladesh.
1965: Led by the German Reich, the Pact of Europe is signed in Hamburg. Founding members are Germany, Austria-Hungary, Poland, Denmark, the Netherlands, Belgium, Great Britain, Romania. Customs borders and travel restrictions are removed.
1970: The Philippines crisis. President Kennedy orders the stationing of nuclear missiles. The world is at the brink of a nuclear war, as Japan demands that the missiles are removed. Under negotiation of the German Empire and the International Council, the crisis is solved.
1972: After having lost almost all ist colonies, France joins the Pact of Europe.
1968: Kaiser Friedrich IV. is crowned. This results in the unification of the United Kingdom and the German Empire under one crown. Two seats of government are established, in London and in Berlin.
1974: Spain, Bulgaria and Portugal become members of the European Pact.
1976: The satellite „Trabant 1“ (Germany) is the first artificial object in space.
1978: Pact of Europe is extended with a joint military alliance.
1982: The US astronaut Robert L. Young is the first human in space. Beginning of the space race for the moon.
1987: The German Empire puts the first man on the moon. The landing craft is named Adler (eagle).
