Sheppard

Major Shepherd was a commander in the Normandy Landings.

World War II
After Foley's 506th Parachute Infantry Regiment captured Sainte-Mère-Église he sent Mody, Elder and Martin to report thier status to Shepherd and were to get thier next orders from Shepherd. Once they got there by means of car they got thier orders to attack a German outpost in Normandy.

Trivia
It's possible that Shepherd of Modern Warfare 2 was named after him. And both have some things in common Shepherd is never acually seen, only mentioned.
 * Both are high ranking army figures.
 * Both are with the US army.