I was aiming for a tank and it rolled back and I saw a guy running. Since I was aiming my RL anyways I just let it go and hit him from a large distance. At the same time the crown defense timer ended. I kill him and all at once I get a medal for my launcher, a marksman ribbon, and a large outpost defense ribbon. I felt bad that I just used a RL to kill the infantry guy but I learned that you can get marksman with a RL.