Military Leader Disappeared right after it said I got a military leader.

[Skybuck]

(Game where catapult bug was used by someone

Also in the same game I got a military leader but it disappeared ?

Maybe he killed it with a trainer me thought...

Because it's impossible for military leaders to just when my stack attacks.

The leader is a non combat unit so it wont attack, maybe it was a bug though !

(First game crash, then reload, then catapult bug, then leader gone, he tried to stress me as well by keeping timer fast and sending many units, then I had enough, told him I trust him anymore, rightfully so and then I quited ! =D and then I tested it in civ3conquest editor and game test... military leaders can't die... non combat units can't attack !)

 

[bustedsynapses]

Military leaders can die, of course. If they move into a square with a hidden unit (e.g., an assassin), they get killed. I bet your stack kept attacking after you got the leader, and the leader was selected to move in against an invisible unit.