…The Nationalists opened with offensives in the south under General Franco to link up the disparate pockets, followed by a thrust to link up with nationalist territory in the North. Meanwhile General Mola was crushing Popular Front pockets in the northwestern part of the country. Both moves proved highly successful and were completed by the end of August.
By contrast the Popular Front attempted to crush the isolated Nationalist position in Valencia and regain control of the Balearic islands. The former was a partial success, having mostly ground down the Nationalist garrison by the end of August while the latter was an unmitigated disaster. Poor coordination meant that the landing was delayed until September 1st, misunderstanding of the tides saw troops have to land too far offshore, provision for gunfire support was inadequate and over the beach logistics was bungled. Worse was what happened after the Nationalist heavies forced the straits of Gibraltar. Not being able to cover their naval supply line against the modern Castila and Canarias class warships, the Popular Front attempted a withdrawal. This was bungled with almost 2,000 men left behind and forced to surrender, worse an Italian “volunteer” squadron of torpedo bombers struck the anchorage, sinking the battleship Jaime I and forcing the fleet to scatter and allowing two transports to be killed by Nationalists submarines…
…In September the Nationalists launched three assaults. The first and smallest targeted the area around Malaga to the south. The second smallest assault was Mola’s campaign in the north to capture the western half of the Pyrenees and cut supply routes to the Popular front from France. The largest nationalist offensive was Franco’s campaign to first relieve Toledo, under Popular Front siege, then to take Madrid. The Popular Front for their part lacked the organization to conduct any more major offensives and was limited to local attacks and responding to Nationalist moves.
The Malaga campaign and Mola’s Pyrenees campaign both proved to be completely successful, achieving their objectives by the end of November. Franco’s campaign was not as successful, while he relieved the siege of Toledo by September 16th, Madrid proved more difficult. Its symbolic importance was such that the disorganized individual commanders of the popular front saw that it needed to be defended and rushed to reinforce it. Thus Franco’s four attacking columns, plus an internal rising that spawned the term “fifth column,” found themselves facing a never-ending fountain of enemy reinforcements.
After failing to take the city on the march in September, or in a preplanned deliberate attack in October, Franco chose to surround the city and attempt to starve it out. Fierce WWI style trench warfare thus sprang up northeast and southeast of the city as Franco attempted to cut the eastern supply routes. This bloody stalemate continued for the rest of fall and winter, while Nationalist forces made minor gains elsewhere, taking advantage of the popular front preoccupation with Madrid and lack of coordination and leadership…
…Both sides of the war received considerable foreign troops as volunteers. Italy, Germany and Portugal sent what were effectively organized and equipped military units to the Nationalists while the USSR did the same for the Popular front. Similarly Catholic, Fascist and Volkist organizations raised volunteers for the Nationalist cause, while the Communists did the same for the Popular front. While never constituting a significant portion of the numerical strength of either side, the organized units proved of outside importance. The Soviet units proved to be the only Popular Front forces equipped to a reasonable standard, thus were the only effective mobile reserve they had. On the other side the professional foreign troops were able to spearhead assaults and allow the Nationalists to break WWI style stalemates to a much greater degree than they would have otherwise been able to…
-Excerpt from European Wars for Americans, Harper & Brothers, New York, 2004
…The experience of their volunteer troops in Spain proved to be invaluable for Germany and Italy. Using their new equipment and doctrine in a wartime environment allowed them to see flaws that were not apparent in testing or wargames. The Italy and Germany made major changes in armor design and organization, among other things, thanks to the war in Spain that put them comfortably ahead of most of the world in some ways…
…The USSR also learned a considerable amount of lessons from its firsthand participation in Spain. Unlike in Germany and Italy, most of this knowledge was lost due to Stalin’s paranoia, as officers who had served in Spain were held in greater suspicion during Stalin’s purges…
-Excerpt from Steel Talons: Armed Forces of the Interwar, Dewitt Publishing, Los Angeles, 2011
…The Spanish Civil War had two different impacts on air forces around the world, depending on if they had actually sent volunteer squadrons or not.
In those countries which had not participated it was used by airpower advocates and bomber barons as a vindication of their views. The fast bombers used by both sides proved difficult to intercept, with Popular Front Barcelona suffering under constant raids by Nationalist bombers that they could do nothing about. Thus it was argued that the bomber will always get through, fighters and air defenses were pointless, better to spend the money on more bombers. This of course ignored the fact that the Popular Front lacked the radars that were becoming more common in first tier states, had insufficient heavy AA and a perennial shortage of fighters.
Airpower advocates further misinterpreted one of the most controversial incidents of the war for their own benefit. The attack on Alcarras, a deliberate massacre according to the Popular Front, a navigation error during a bombing of an HQ in Lleida according to the postwar Spanish government, saw between 300 and 1200 die in an aerial attack involving 20 tons of bombs. Air Power advocates used deliberately inflated numbers of dead to oversell the effects of the attack, getting ratios in excess of 60 dead per ton of bomb, where outside the use of biological, chemical or nuclear weapons, WWII experience would show that anything above 12 deaths per ton of bombs on an urban area was an outlier…
…Among those air forces who actually participated in the Spanish Civil War different lessons were learned. Namely that morale bombing, as advocated by airpower advocates, did not work, civilian morale would not break under air attack. What was effective was using airpower in an operational role, attacking targets supporting the frontline such as headquarters, reserves and transportation infrastructure.
Furthermore the Italians and Germans learned that their biplane turn fighters were inadequate against Soviet monoplane energy fighters. This would give them a definite leg up in adapting energy fighter monoplanes over the other western European states…
-Excerpt from Airpower!, Dewitt Publishing, Los Angeles, 2010
…Use of the term Popular Front to represent a side of the Spanish Civil War, rather than just a political alliance, originated with the post-Civil War Spanish Government. This was part of a concerted campaign by the Spanish government to strengthen their legitimacy by denying it to their former opponents. Thus they did not use the term “Republicans” as that term implied they were the legitimate government of the Spanish republic. For similar reasons they did not use the term Loyalists or Government faction. The term Popular Front was used as something more formal than their preferred terminology of Reds that did not imply legitimacy in the same way.
This terminology was for the period following the end of the Spanish Civil War to 1965 generally only used by Fascist, Volkist and other extremely conservative sources, with Republicans being the standard terminology outside of that . Following 1965 there was a rapid adoption of the official Spanish government terminology due to…
…This adoption was functionally complete by 1980 in the English speaking world, with only far left sources continuing to use the term “Republicans” when describing the Spanish Civil War…
-Excerpt from Historiography of the 20th Century, Columbia University Press, New York, 2020