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

Soap:“Guys meet my brother!” He gestures towards you

Ghost:“Nice to meet you.”

Gaz:“Hello,are you by any chance in the military yourself.. You're clothes ya know” He motions towards you're clothes, las 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”