Supreme Ruler 2020—how do I conquer other countries?

[Beceere62]

I didn't understand anything about supreme ruler 2020 game. I enter enemy lands with my army. But enemy troops never end. They come all the time. Do I need to load weapons to attack my air, sea and land troops? Or can they attack immediately as soon as they produce? How are other countries conquered in this game?

[Mod edit: changed title for clarity, and moved from General Gaming.]