The climax happens when Operation Red Wing begins.
Operation Red Wing was a reconnaissance mission that Seal Team 7 was ordered to do. The mission was to get feet on the ground and look for Afghanistan soldiers and see what intel they could collect. The team captured three sheep herders and let them go. Soon after, they were ambushed and were forced to jump off several 30 foot ledges to escape. Danny, Axe, and Mikey died after three long fights.