Your challenge is to have Galicia be either independent or a part of Portugal, with a POD in 1900.
For me, there are two windows of opportunities.
The first is the 1930s Spanish Civil War end in a stalemate or in a very fragile Spain (I don't know what's necessary to do this), with the balkanization resulting in an independent Galicia (to make it funnier, an independent fascist Galicia led by Galician Francisco Franco is an idea I've never seen be used).
The second is Spain joining the Axis in WW2, being invaded and as part of its surrender, being balkanized (Independent Aragon, with a Galicia that is either integrated into Portugal or is established as an independent republic).
Bonus points if you can make Galicia independent post-1970 or during Franco's regime post-WWII
For me, there are two windows of opportunities.
The first is the 1930s Spanish Civil War end in a stalemate or in a very fragile Spain (I don't know what's necessary to do this), with the balkanization resulting in an independent Galicia (to make it funnier, an independent fascist Galicia led by Galician Francisco Franco is an idea I've never seen be used).
The second is Spain joining the Axis in WW2, being invaded and as part of its surrender, being balkanized (Independent Aragon, with a Galicia that is either integrated into Portugal or is established as an independent republic).
Bonus points if you can make Galicia independent post-1970 or during Franco's regime post-WWII