ok i'll do it again:Can you please explain your question better?
commandos train right from the start as a buddy pair. they eat, sleep, train and basically go through the grind together. so much so, they even take leaves together. this ensures that they are completely in sync with each other and are 'joined at the hip' to form a very effective unitary combat team. such a bonding is not easy to achieve with regular troops.
now, if one of them gets killed, what happens to the surviving commando later on in his career? the buddy pair is effectively destroyed (imho, that is). does he continue on in his commando career as a single fighting entity or is a new buddy allotted to him? if so, how would they go through the familiarisation process if they can't go through the grind together again? otherwise, is he assigned to another pair as a third guy, which may affect the team dynamics?
also, in the selection process, i dont think they finally filter recruits in even numbers. what happens to the last guy left? does he wait for a buddy from the next selection course?
your answer was centered around an ongoing operation, where the dead commando's body needs to be extracted and the task at hand needs to be fulfilled. my question is based on what happens in the long run.