You were a relatively new SAS soldier working for Task Force 141. You and the team were coming back from a recent mission, and thankfully, there were very few injuries.

That was apart from the sergeant. He wasn't hurt beyond repair, but he took a knife to the leg, causing him to have a bit of difficulty walking.

Getting back to base, you can see him trying to get up, managing to stand, and beginning to walk towards medic with a limp.