Because the average civilian cannot fight as a productive unit to properly defend their country.
Professional training - none. Military training - that of an ordinary soldier.
To receive military training you must go to an military school or some academy for military. Or even a boot camp can help you learn about military training.
Spartans were committed to military service because they were supported by serfs who worked the farms. Athenians were committed to earning their living, with military service part time, for training and being called out when necessary.
His military training.
In the Israeli military only necessary actions are done on Shabbat.There are no training, but if there are things that have to be done (like patrolling in the borders) they are done on Shabbat. This is ok because it is "Pikuach Nefesh" (peoples' lives will be in danger if the military will not guard them on Shabbat).
There are several websites that show military training videos. A local armed services office should also have military training videos.
what education and training are necessary for being a CSI
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Yes, everyone in the Military is required to go to Basic Training.
Depending on what one's military occupational specialty is, will depend on the type of training that they receive. I was a radar repairman. I went to basic training, military combat training, basic electronics school, and radar repairman school.
Military work of course entails extensive physical training, but also incorporates educational training as well. the military tries to provide better all around soldiers, not just muscle.
Your Entry Level Training comes in two phases - Basic Combat Training, and Advanced Individual Training. In BCT, you learn basic soldiering skills. In AIT, you learn the skills necessary for your occupation in the military. Additional training will come as you advance in your career, move up in rank, and take on new responsibilities.