Marcus Luttrell was a Navy SEAL who served for 8 years. He was deployed to Afghanistan with SEAL Team 10 in 2005 and was involved in Operation Red Wings, in which his team was ambushed and only Luttrell survived. He was awarded the Navy Cross and Purple Heart for his fight against the Taliban in this operation, and he went on to write a book called “Lone Survivor” which was followed by a movie. https://www.navyseal.com/books/service-by-marcus-luttrell/