I am trying to expand beyond basic combat trauma care. Its not always safe for a bird to land. So if there is one corpsman for x amount of vehicles and 3 get hit that's at least 9 casualties. If a casualty has no pulse and is not breathing I should wait for the corpsman to come up and perform CPR because I shouldn't know it? I should leave it to chance because I shouldn't learn. A tactical convoy moving supplies is much different than a grunt line. Your cargo is not a load of devils looking to get some but 12 pallets of MREs that don't shoot back. Yes we have air support but if it was me I would not give a damn who is trying to perform CPR. A casevac isn't as fast as a ambulance especially if fire superiority is not gained, also the first responders to a downed vic is not the corpsman.
Look, I understand your desire, but CPR is not practical very in combat. If you want to learn it, its good to have..but more often than not if someone is not breathing or lacks a pulse on the battle field CPR is not going to help due to the nature of the injuries that cause those complications. If you stop to preform CPR you are obligated to continue until you are relieved by someone else.... thus taking you out of the fight and preventing you from helping multiple casualties. If you want to do CPR, then the area has to be secure, and no other casualties require assistance...then you can do it.
As for the pulse, you don't check that in the care under fire setting...never..no way...the thought shouldn't even cross your mind. You don't have time for that, and neither does he. Your ONLY concern is stopping massive hemorrhage and getting him some place out of the line of fire(not necessarily in that order). If a causality lacks a pulse, more often than not its due to fact that massive amounts of blood have been lost. If you want to take a pulse once the excrement stops flying... check the radial pulse... if its palpable.. good.. if not... move on unless you have been trained how to restore volume to a circulatory system.
Really, I am not trying to knock you... or dissuade you... but the harsh reality is people die in combat... If you want to save the guy who is on the ground, grab your weapon, return fire, and get him the hell out of there. Unless you have an aid bag stocked full of supplies and know how to use them very well... your best bet to save your buddies life it to get him to a higher level of care.