Dover Patrol was effectively the naval version of L'Attaque. There were four games made at the time, L'Attaque, D.P., Aviation and Tri-Tactics, representing Army, Navy, Air Force and all three combined respectively. All were on the same principle of cardboard pieces mounted on tin (later plastic) bases where the backs facing the enemy were blue for one side, red for the other, so that each player knew what his/her pieces were but the enemy didn't. Most pieces were numbered 1 to 10 with the higher numbers beating the lower, but there were some special units outside that simple rule. Attacking was done simply by moving your piece up to an enemy piece back-to-back and saying "Attack". The object of Dover Patrol was, I believe, to enter the enemy's harbour after demolishing enough of his pieces to make this feasible. The board was an 8 x 8 grid. It was a most enjoyable game, somewhat like Chess but with the added fun of having to discover what pieces you were up against where, which lent a pleasing suspense to the proceedings. I thoroughly recommend it.