Let's say it's 1914, Spain and Italy were to form an alliance and coordinate an invasion of France. France is aware that this is coming. Could they win?
Four rounds:
Round 1: Spain and Italy vs France. Just like IRL, the Spanish Empire is by now nearly non-existent. No other country can fight or send aid.
Round 2: Spain and Italy vs France. However, Spain never lost its colonial empire (they retain all of the Philippines, Central American, South American, and Caribbean colonies etc). Assume that all Spanish colonies are on the whole loyal to Spain and would back the war effort. No other country can fight or send aid.
Round 3: Same as round 1 except based mainly on self-interest (and assuming Spain and Italy came up with a decently palatable excuse for the invasion), all countries in the world can join on either side of the war.
Round 4: Same as Round 2 except based mainly on self-interest (and assuming Spain and Italy came up with a decently palatable excuse for the invasion), all countries in the world can join on either side of the war.
Please speculate on which side would win which rounds, the how and the why. Discuss.