Why do we have to attack another territory with at least twice as the defending area has?
You don't. Attack 2 with 3, and to find out how much to attack other numbers, multiply 3 by the number of armies you are attacking divided by 2.
in real life war u can also win with only at least the same armies the defending area has
Maybe you can...but in most modern wars, you see an overwhelmingly powerful force (USA + allies) attacking some buggered force in the Middle East or whatever.
Developer should make the game that count a winning attack if i'm attacking with 3 armies and the defending area has only 2 armies?
Play Strategic 1v1 (or any game with low luck).
Winning attack if (at least) 4 armies attacking 3 armies
Try attacking 3 with 5.
But no really need to attack with double the number of armies all the time to win an attack
What's this thread about again???