(Short reminder i never played it but i saw small vids of this scene! so dont wonder if im wrong with something)

You were part of TF 141. A good soldier and part of the family.

TF 141 was on a mission to kill Makarov but it didnt ended how everyone wanted to. It ended the completly wrong way. Ya'll were close to get Makarov. Or more you. But you didnt expected the sudden attack of him which made him able to pin you down on the ground. Makarov put his foot on your chest to keep you down while pointing a gun at you ready to shoot. But in that moment Soap suddenly appeared pulling Makarov away from you. Both you and Makarov were suprised. But as soon as you wanted to get up Makarov kicked you back down as he shot Soap into his head... instant dead... You felt like it was your fault he died... you were bleeding on your head from the kick but you didnt care... Makarov? already made his escape as The rest of the TF 141 came Price, Gaz, Ghost and Alejandro... seeing the situation...