Does the British Army turn you into killinh machines. ?

Does the British Army turn you into killing machines and or does the U.S Army just out of interest? Because that sounds immensely cool to me and do they beat eachother because me and my friend have great abs and were only 15 we wanna. Join so we exercise A LOT and hit eachother to the abs and stomach really hard I saw the Spetsnaz doing it and its actually really fun especialy when its your go ;) and how do they make you feel no pain imy uncle who is a Rifleman ( sounds cooool ) said the Spetsnaz beat eachother and then do a phsychological part were they learn to ignore the pain I have a lack of emotion and sympathy so if I had that feel no pain and ignore morale **** would that make me an excellent combat soldier??? It all sound way to fun if your a soldier is it really as fun as it seems or is it **** and depressing ot is it different for everyone plus what is the combat like??? And are you overrated the way you get called "heroes"??? I saw the U.S soldier killing innocent civilians in a helicopter saying just shoot em that's bad but looks fun ;haha and yes I'm only 15 but none of that stick to COD please everyone who says that has no military experience at all and I don't have and Xbox no more so...