Franks

Sergeant Franks is a US National Guard and playable character who appears in Call of Duty: Modern Warfare 3: Defiance.

Nevada suburb
In the mission "Running for Cover", Franks is deployed with Capt. Ramirez, Sgt. Benson, Sgt. Travis and an unnamed soldier in a Nevada suburb to eliminate the Russian presence and provide support to any allies within the area.

The mountains
In the mission "Through the Mountains", Franks is teamed up with Ramirez, Travis and two unnamed soldiers to form a sniper team. The team recieves orders to stop oncoming Russian forces headed for Hoover Dam.

Trivia

 * It can be implied that Franks is an experienced sniper. He is refered by Ramirez as their "Best shot" and snipers are featured in the levels Franks is played in.