allies are aggressive and axis are more defensive.
One accurate statement.
at the most basic level, defending is always going to be easier whilst aggressiveness having much higher potential for bigger rewards at higher levels.
Meanwhile, in any combat, the one who has the bigger chances is the one who has and keeps initiative, allied being specifically designed in this direction, while the one who loses initiative is the most exposed, no matter how good his defence is. This is a basic rule of war, since the dawn of human kind.