Favorite conquest (1-star edition)
1939 Yugoslavia: Winning using the country with the least survivability is very rewarding. For late game players only.
1943 Egypt: The starting heavy tank is a very huge help.
1950 Greece: The only 1-star country with level 4 factory that is located in a safe place, unlike Denmark. If you have enough firepower, you can even occupy Bucharest, Belgrade, Munich, and Milan.
1960 Iran: Iran is near to both China and Europe. It has a level 4 factory and a nuclear facility. Once you reach Lyon, nuke nuke nuke!
1975 Japan. It is one of the hardest conquest in 1975, yet the strategic location of Japan is the key point to break through, defend, and invade. For late game players only.
Favorite conquest (2-star edition)
1939 Poland: Pull an uno reverse card and march to Berlin! For late game players only.
1943 Spain: Land on USA early and enjoy launching nukes.
1950 Turkey: The bridge between Europe and Asia.
1960 Italy: You will neither be steamrolled by the Soviet and Polish forces (comparing to Germany), and your capital is out of reach from Soviet and Chinese nukes (comparing to Germany and Japan).
1975 UK: Being an island nation helps UK gather forces and capture Manchester and London. Also, you can send rocket artilleries to America early.
Favorite conquest (3-star edition)
1939 Soviet Union: Capturing Sapporo using Voroshilov, Shaposhnikov, and some naval support to prepare for the raid of Tokyo is what makes Soviet Union 1939 my favorite.
1943 United Kingdom: Dowding can capture Amsterdam before Goring spawns. UK being strong on three fronts speed up the game.
1950 United Kingdom: You can nuke Bangkok and defeat PRC before the onslaught of paratroopers begin.
1960 Soviet Union: 10 pre-deployed generals plus 6 generals you own. Just retreat Timoshenko and Vasilevsky before they get nuked. Deploy no generals in Siberia because before they land on Japan, they have been long before nuked. Capturing Seoul will be your only turning point in Siberian front.
1975 Soviet Union: The only three-star nation whose important city is not within the range of a fortress. Also, it has two super tanks and two rocket artilleries. You can beat it using Guderian, Patton, Govorov, and Badoglio using lvl 9 artillery tech and max tech panzer.