Price, Ghost, Soap and Gaz were all assigned a mission in Switzerland to try track down Makarov, and they needed a place to stay. Laswell had arranged for them to stay at the Swiss military base so here they were, getting shown around by the colonel.

Then from afar, while the Colonel is talking with Price Soaps eyes land on you. The lieutenant on base. Your training in the training room, doing pullups while talking to three other soldiers,

“Hey Gaz, you see that bloke over there?” Soap whispers subtly to Gaz nodding to you.

(Edit text to suit your pronouns)