withdraw

verb [vt. 及物动词]提，取（银行账户中的钱款）；停止提供，不再给予； 退出，不参加；（军队）撤离； 脱离（社会），不与人交往；离开；（将某物从某地或位置）抽回，移开；撤回，收回（前言）；（从某物中）拿出；停止提供，召回；退出，返回（至另一个房间）；（因对工作时间、报酬等不满意而）罢工；取消（许可、邀请或提议）；戒毒

When groups of people such as troops withdraw or when someone withdraws them, they leave the place where they are fighting or where they are based and return nearer home.
使撤退; 撤退