Hitler dies in WW1, leading to the a German civil war between the Communist party (backed by the Soviet Union) and the Party for Working Class Fascism (backed by the Italian Union), the Libertarian Black Army (made up of the Spartakusbund, the Anarchists, and the supporters from the Free Territory)
Trotsky escapes to Austria with a large number of supporters and Red Army soldiers and Creates the Free Balkan Soviet Federation in alliance with the Orthodox Church (think Soviet Poland and the Catholic Church)
Trotsky causes confusion in the Red Army, allowing a rump White state to consolidate itself behind the Caucuses and the Makhno to set control the Ukraine.
Mussolini becomes a National Syndicalist, under a more leftist form, creating the Italian Union of Peasant and Proletarian Syndicates and Councils.
The political left is divided along 3 lines, one follows the Roman Doctrine, one Trotskyte, one Stalinist.
This division allows a National Front victory in Spain, soon the CNT, POUM, UGT, CPS, Social Fascist Falange and The Movement for Social Salvation (Liberation Theology unique to Spain, mixed with Catholic Workerism) meet to plan a rising against the Nationalist government. The rising gives the Left the advantage of planning and surprise the Left had IOTL. Is this realistic
The Basque and Catalan Nationalists are with the nationalist government as it gave them independence