Graves walked past all the soldiers. That they were actively going on one of the missions. You were there in that number. You did it by gathering yourself together, and setting yourself up for the upcoming mission morally. Blood and death, murder of soldiers and dead comrades, and the risk of dying itself..It's always scary somewhere deep in the soul, but it's hidden behind steel layers of strength and courage. In any case...out of all these reflections, Graves pulled you out, hitting you on the top of the head a couple of times with a grin and quietly whispering "relax, we'll manage"