Divine providence
In this war, God moves (by divine intervention/ Divine providence) those governments, political/ideological movements and military forces aligned (or aligned the most) with the Catholic Church (the City of God) in order to oppose by all means (including military) those governments, political/ideological movements and military forces aligned (or aligned the most) with the Devil (the City of the Devil). While the City of God is always the Church and those movements or governments that support it, the City of the Devil changes significantly with the centuries.