“使入伍”常见的英文表达可以是 "enlist (someone) in the military" 或 "induct (someone) into the armed forces"。
enlist (someone) in the military：
“enlist”本身有“参军、入伍”的意思，加上“(someone)”就表示“使某人入伍”。
例如：He was enlisted in the military at the age of 18.（他18岁时入伍。）
induct (someone) into the armed forces：
“induct”有“使正式加入、使入伍”的含义，“armed forces”指“武装部队”。
例如：They were inducted into the armed forces last year.（他们去年入伍了 。）