Semper Fi

Introduction
The Marine Raiders' insignia

Semper Fi is the first single player level of Call of Duty: World at War. This mission takes place on Makin Atoll, which is home to a small Imperial (Japanese) army base. The player, playing as Pvt. Miller from the 2nd Battailion of the Marine Raiders, Carlson's Raiders, is held captive by the Japanese, and witnesses the brutal murder of his fellow Marine. The player's life is saved by Cpl. Roebuck, who then says "we will make them pay for what they did". The player then makes his way through the island to rescue another group of soldiers, who are under siege. The player then proceeds to blow up a the Japanese bunker, crippling their operation there. While making his way to the boat, the player is attacked by an enemy soldier wielding a katana (Japanese longsword or 'Samurai sword', if you want), but his life is saved by a fellow Marine. He is dragged to the boat and witnesses a large explosion.