第一梯队 meaning in English

leading echeloning

The first time an asia - pacific business school enters the " first - tier
亚太区商学院首次迈进全球榜单“第一梯队”
After our first echelon was 250 or 300 kilometers ahead , the second and third echelons still had to wipe out enemy troops left behind
甚至我们的第一梯队已过去五六百里，第二第三梯队还要消灭被第一梯队甩在后面的敌人。
Sharpest department with few manpower , is in charge of studying and precisely attacking enemy ' s important target , can let the enemy be chaotic without our attack , thus strategy department is the first and leading team among all the teams
一个人手少但最精锐的部门，在实际战争中专门负责研究和精确打击对方的各重要目标，让对方阵地不攻自乱，因而是所有行动小组的第一梯队和领导组。