to lead something such as an attack or a course of action

British troops spearheaded the invasion. 英军充当入侵的先锋。

Joe Walker will be spearheading our new marketing initiative. 乔‧沃克将会负责推行我们新的营销计划。

a person or group that leads something such as an attack or a course of action

American troops formed the spearhead of the attack. 美军是进攻的先头部队。