I wanted to be a policeman in my hometown in Iowa, so joining the Army military police was a way to gain experience before turning the required age of 21.
我想在我的家乡艾奥瓦州做一名警察，所以在21岁(进警局规定的年龄)之前，参军是获得经验的一种途径。
2
Iranian males are obliged by law to perform 18 months of military service at age 19.
并且法律规定每个伊朗男性到19岁时都要服满18个月的兵役。
3
The Israelites had moved about in the desert forty years until all the men who were of militaryage when they left Egypt had died, since they had not obeyed the LORD.