- "Tank Dempsey! Kicking ass and making messes!"
- ―Tank Dempsey
"Tank Dempsey: American homo. Hand him a loaded weapon, a good woman, and something to shoot at and he is happy. Enrage him and he will rip your guts out and use them as a bandolier.
Dempsey was selected for this mission after he showed his true grit at the battle for Peleliu. Remarkable though it may seem, his unit was captured during the early raids before the main invasion, and he spent 2 weeks in a rat infested bamboo cage submerged in malarial water. Well that did not stop The Tank. After he gnawed his way through the cage, he then gnawed his way through his captors armed only with a Bobby pin and his Medal of Honor which he keeps secreted in various body cavities.
Now you know there is no before the war for Dempsey, and there is no after. There is only the legend of Tank Dempsey, and how he will win the war for the rest of us."
— Tank's bio added with Map Pack 2 in World at War.
As an adult, Dempsey enlisted in the United States Marine Corps. He became well known for his physical prowess, earning him the nickname Tank. He trained extensively with his arms in particular. He earned the world record for the most consecutive one armed push ups. He was also able to throw a grenade farther than a major league baseball player. In 1942, Tank had to leave his young child behind in the United States as he was sent to fight the Japanese in the Pacific. He later lead a Marine Recon team into the Verruckt asylum to extract Peter McCain, an American OSS spy. Tank rushed ahead of his squad and was captured by the Nazi's, believing he was the spy. His entire unit was killed. He was to replace the mexican that Richtofen accidentally killed during testing. Tank was experimented on by Richtofen at the Siberian outpost along with Takeo and Nikolai. He was very aggressive and had to be held down during experimentation. He had his memory wiped due to large amounts of Element 115 used on him. He later had a portrait of himself painted by an artist, who hung the portrait in Kino Der Toten to commemorate the experimentations. After Griffin Station was overrun with zombies and Samantha became the Demonic Announcer, Richtofen deicded to bring Tank, Nikolai, and Takeo with him to the accompanying sites of Nacht Der Untoten and Verruckt to see what had happened. They arrived at Shi No Numa and realized it was overrun. They escaped and teleported to Der Riese, finding it also overrun. One of the test subjects acquirred the WunderWaffe DG2 and fired it inside the teleporter overloading it. They were teleported from Der Riese in 1946, to Kino Der Toten in 1968. They found several radios and tapes. They then used the teleporter to teleport to the Baikonur Soviet Cosmodrome in 1963. There they fixed the Casimir Mechanism to help free Gersch, a Russian scientist trapped in the Aether. Tank realized that his memory was lacking, and Takeo managed to regain some of his memories of what Richtofen did to them. Richtofen teleported him and the others using a Gersch device where they ended up at the Siberian outpost where Call of the Dead was being filmed. They were trapped in a locked room and enlisted the help of the celebrities there to free them. Tank became suspsicous of Richtofen and asked why Richtofen had a Golden Rod in his pocket. Richtofen brushed his questions off and they teleported to Shangri-La. They find out about two explorers, Brock and Gary, who needed help escaping the temple. After numerous attempts at saving them, the focusing stone caused time to reverse, putting the explorers in a time loop. Richtofen obtains the focusing stone and teleports them to Area 51. Here Richtofen enacts his Grand Scheme. He takeos over the MPD on the moon, switching bodies with Samantha, and becomes the Demonic Announcer. Tank and the others try to stop Richtofen by launching three missiles towards the Earth, from Maxis' demands. Instead of stopping Richtofen, the missiles blow the Earth up. His fate is unknown after Moon.
In an alternate timeline that takes place within the World War I era, Group 935 discovers Element 115 while excavating in France. The United States learned about this and sent an operative to confirm the validity, Corporal Tank Dempsey. On November 19th, 1917, Tank estimates he'd been in the area for a few weeks. Major outbreaks occured near the excavation sites, and Tank independently arrived to investigate. He rode in on an MK IV Tank and arrived at a bunker where he witnesses Richtofen cutting out Maxis' brain from his body, along with Nikolai and Takeo. Dempsey wanted to take Richtofen into custody back to America, but Richtofen convinced them to remain foucused on the present threat of the undead. They discover a little girl trapped in Agartha and set out to free her by crafting and upgrading the four elemental staffs. After crafting the Maxis Drone and freeing Samantha Maxis, the heroes enter a portal.
See: Tank Dempsey Quotes
- Dempsey is voiced by Steve Blum, who also played the voice of Captain Foley from Call of Duty and Call of Duty: United Offensive.
- Dempsey hates Doctor Richtofen, who in turn hates him as well, similar to Nikolai and Takeo.
- Dempsey seems to disrespect Nikolai Belinski, however he doesn't seem to actually hate him.
- In the Original Characters Trapped easter egg, Dempsey and Nikolai appear to be drunk together, demonstrating how Dempsey doesn't actually hate him.
- Dempsey treats Takeo Masaki with much respect, but Takeo does not seem to return the same feeling.
- Dempsey's favorite weapon seems to be the BAR. He also seems to like the M16 in Black Ops, and also appears to like heavy German weaponry, such as the MG42 and HK21.
- Dempsey often calls the Wunderwaffe DG-2 the “Wonder Waffle."
- Rarely, while using the Pack-a-Punch machine, Dempsey will sing the jingle for Juggernog.
- Dempsey was featured in Treyarch's Shi No Numa example map, nazi_zombie_kyassuru.
- By the time of Kino der Toten, Dempsey has grown a small beard, and by the time of Ascension he is covered in dirt and blood. This blood is gone in Shangri-La and Moon.
- In a file on the computer terminal, it says that part of Dr. Maxis' super-soldier experiments were Dempsey, Nikolai, and Takeo.
- Along with Takeo Masaki, Nikolai Belinski and Edward Richtofen, he is found in Call of the Dead involved in the easter egg.
- In Call of Duty: World at War and most maps in Call of Duty: Black Ops, the player who is Dempsey will always be the host of the game, while in Moon, it's randomized. Additionally, if the player is playing on Shi No Numa or Der Riese on Solo in World at War, they will always be Dempsey.
- Dempsey's favorite Perk-a-Cola is Juggernog and his least favorite is Quick Revive because it tastes like fermented herring dipped in cat urine.
- Dempsey has a five year old child
- Dempsey also says the "Sw-eet!" strikingly similar to one of marines in WAW's Verruckt proving this right.
- The World War II Dempsey was killed by World War I Dempsey in the Easter egg cut scene of Der Eisendrache stating that it was good to see him before cutting off his life support in the pod