United States Navy/Modern Warfare

Call of Duty 4: Modern Warfare
In the mission Shock and Awe, as the U.S. Marines assault the capital city, operators from SEAL Team Six are mentioned to have located a nuclear device in the presidential palace. Along with NEST team members, they attempt to disarm the bomb, but despite their efforts the nuke detonates, killing approximately 30,000 People.

Call of Duty: Modern Warfare 2
The United States Navy leads the assault of The Gulag and several oil rigs, providing both artillery barrages and air support for TF-141, under the control of General Shepherd, however they seem to follow his orders with less urgency than the Rangers in Washington D.C. do.

During the Battle of Washington, D.C., Navy SEALs fast-rope onto the Department of Commerce to help retake it. The Rangers assaulting the building eventually link up the with SEALs on the roof to evacuate from the city. However, during the evacuation, the SEALs are shot down.

Call of Duty: Modern Warfare 3
The U.S. Navy is seen in the level "Hunter Killer" where they fight against the Russian Navy while SEALs and Delta Force squads infiltrate a Russian Oscar II-class SSGN and launch the boat's cruise missiles against the Russian fleet.

Ships

 * Los Angeles-class submarine
 * Landing Craft
 * Zodiac (Endgame and Hunter Killer)
 * LCAC (Goalpost)
 * Arleigh Burke-class guided missile destroyer (Hunter Killer)
 * Nimitz-class aircraft carrier (Hunter Killer)
 * San Antonio-class amphibious transport dock (Bag and Drag)
 * Wasp-class or Tarawa-class amphibious assault ships (Charlie Don't Surf)

Named Ships

 * USS Chicago
 * USS Dallas
 * USS Nimitz