Question

[Forang]

What exactly is an army/military and how do i get one? im confused in the war part of the game.

[Sedgistan]

There's two answers to that question.

You can invade regions within the game, and there's a good explanation of how that's done here: viewtopic.php?f=12&t=99173

You can invade nations, which is done by roleplaying. There's lots of guides to doing that, but the best place to start is here: viewtopic.php?p=1354702#p1354702