Hey booni - welcome!
If im in battle with NPC with a huge army and net disconnects.than what? will my army forfeit and perish?
In most cases things will go back to just how they were before the battle - your army will be like it was on the worldmap, as if it never entered the battle. In a rare instance you might loose some progress. But it shouldn`t be that bad.
And if you do decide to buy the game, please let us know how it`ll work out for you - hopefully it`ll work well enough. Sorry that I can`t be 100% reassuring - but it`s tricky business playing online game with shaky connection.