unfortunately we do SJ. when sh*t goes wrong in the world, who does everyone look at to help? the USA.
Well, you tend to not be alone, though you do tend to send more and other countries that advantage of that and send less.
Now, lets be honest though, when you do get involved its not to FIGHT a war, and it shoudln't be, but to enforce peace and that, like I stated earlier, is a different ball of wax.