I must be a glutton for punishment because nothing that is said here will make an iota of difference but , “l’maan haemes” I have to put in my two cents, in response to DaasYochid and others.
It is irrelevant how many people are available for the army or how many people are or are not learning. IF the situation today in israel is one of danger, then everyone has a CHIYUV to go to the army. As simple as that. Look up the mishne end of soitah and the rambam. It is uequivocal that the duty of defending the Jewish yishuv falls on every one!