Since I’ve seen quite a few here, I’ll lend my view.
R1 - Build 8 Infantry, attack Baltic Sea and Ukraine. Stack up in Yakut, build 6 infantry in Karelia and 2 in Moscow.
G1 - Build 8 Infantry, 1 Transport. Attack Britain’s sea zone with Fighters and any surviving subs. Land infantry in Libya. Don’t attack Egypt yet.
UK1 - Build Carrier, 1 Fighter. Fly 2 fighters to Karelia. Bomb Germany with bomber. Move Indians to Egypt, along with Syrian. Move Transport to Australia.
J1 - Attack China, Pearl Harbor, India if possible. Build 3 Transports. Move infantry and all possible fighters to Indochina and Manchuria.
US1 - Build 3 Transports 4 Infantry. Attack Algeria. Move Pacific fleet to Atlantic. Move Fighters to British Carrier. Bomber to England.