The Marines move and capture peices differently on the wall than anyplace else on the board.
On the board and water, a marine can move one space forward and laterally on to the water or wall. He can move and capture 2 spaces only on the first move. He can capture on any of the three forward directions. He can move onto an unoccupied wall area but he cannot capture a Marine already on the wall. A Marine that reaches the home side of another player exploads, killing all pieces in a two square radious, then returned to play in his home domain.
On the wall he can move along the wall, capture latterally, move backward on the wall. He can move off the wall at the inside end of the wall. He can move and capture in any forward or latteral direction off the front end of the wall.