One of the marines I ' m a corpsman attached to an infantry unit got hurt during a patrol and he stopped breathing . We were in a pretty remote location and I had very limited medical capabilities so I had to perform rescue breaths until the CASEVAC showed up which was about 5 minutes . Luckily he started breathing on his own again right as the CASEVAC showed up . We got him loaded up and we got him to a hospital . It was a pretty terrifying experience . The whole time I kept thinking I would have to tell his wife who was pregnant with his daughter how sorry I was for not being able to save him . I got a lot of praise for what I did from my chain of command and the other guys in my company but I always felt guilty for the praise I got . I did what I was trained to do and nothing more it being peace time not a lot of marines suffer lifethreatening injuries so the attention felt unwarranted . A few weeks later I got a letter from the dudes mother saying how grateful she was for me being where I needed to be and how because of me her granddaughter has a father . The letter really hit the feels for whatever reason , I cried as I finished the letter .