Project "Money comes and goes, but Heroes are eternal!"

while you send all your armies to attack, someone else might capture your land (so you can't send your entire army to attack). Besides, defenders are protected by city garrisons and walls. So, it's easier to defend than to lose. By the way, you can also allow alliances to be formed.

HEY...hello! We're talking about TOURNAMENTS (or WAR in our case)! Like 1x1... or 2x2... I declared war on you, we fight, and then we divide the land based on the results... And what, some random participant will go and capture my lands in the meantime???? Let them declare war on me too, and we'll fight ;)