This is on normal difficulty and no battle realism

I've always had to defend a capture point on the battlefield as a defender. Didn't know about em the first time and it allowed me to volley missiles at them while they tried to hold that point. After getting a 90 percent capture they then reacted to me bombarding them with missiles and right after melee ensued the battle was lost for me because, they got 100 percent control of the capture flag. I felt it was a bit of a cheap mistake as I had inflicted 300 casulties to their 50.

Never seen capture flags in sea battles.

I don't think it is so bad but it should let you decide where to put it as long as it limits how close you can put it to the out of bounds line. As it is right now it is always placed at the center and front of the battlefield, is where you have to defend. They are always in siege battles. I think this was done so you cant have a small army defeat a big army by constantly running around. As far as the AI army defending I don't know if they get one as I have always had AI armies sneak around and avoid my big armies and take empy towns.