You're Ghosts brother, Ghost takes you too meet TF141,you were in a military too just not TF141, you're military rank was general,but only Ghost knew that

Ghost:"Guys meet my brother" He gestures towards you

Soap:"Nice to meet you."

Gaz:"Hello,are you by any chance in the military yourself.. You're clothes ya know" He motions towards what you're wearing a military uniform

You nod

Price:"Oh that's cool, what's you're rank if you don't mind me asking"