i partially agree; yes there should have been more info for first timers, but the thing is that real soldiers are trained to be willing to put their lives on the line. They might complain, but by and large most soldiers are able to accept that if their time comes, it's come. Not to mention that only three technically sacrifice themselves. One guy leaves with the scientist and may still be living, one of them gets killed by a sniper, and the third gets impaled from behind. The three who do sacrifice themselves are highly trained soldiers, which kind of neccessitates being willing to do high risk jobs and, if possible, kill themselves.