Tanks in World War I
The continued need for four men to drive the tank was solved with the Mark V which used Wilson's epicyclic gearing in 1918. Also in 1918 the French produced the Renault FT, the result of a co-operation between Estienne and Louis Renault. As mentioned before, it had the innovative turret position, and was operated by two men. At just 8 tons it was half the weight of the Medium A "Whippet" but the version with the cannon had more firepower. It was conceived for mass production, and the FT became the most produced tank of World War I by a wide margin, with over 3,000 delivered to the French Army. Large numbers were used by the Americans and several were also lent to the British.
Tank Force
The gameplay is very much like that of "Tank Battalion", except that this time up to two (on an upright model) or four (on a cocktail) players can play simultaneously, there are seven new ("regular") types of enemy tanks (Normal Tanks, Speed Tanks, Hard Tanks, Big Tanks, Rapid Tanks, Tomahawk Tanks and Jeeps) and there is fifteen types of powerups (Bonus 500, 1000, 2000 and 3000, Shot Powerup, 4-Way Shot, Hyper Shot, Ripple Laser, Twin Shot, Small, Shield, Bomb Attack, Timer Stop, Force Field and Extend) which appear for players to collect in order to increase their tanks' firepower and boost their score (the one with the highest at the end of any round conquers its hexagon on the overworld map); each round is also the size of 17x13 blocks instead of just 13x13 off "Tank Battalion" and "Battle City", the enemies also roll into view from the top of the screen instead of just appearing and can also enter from the left and right sides, every fourth round is a "boss" round where the players must fight Train Cannons, AK Tanks and Boss Cannons at the top of the screen as well as the round's regular enemies, the players cannot destroy their own headquarters walls, when one player shoots another they will be pushed back (instead of getting stunned for a few seconds), and the game has an ending which will be seen after clearing all thirty-six rounds. The game's seventeenth round is also made to look like "Pac-Man" - even though Tōru Iwatani had no involvement with the title.