(n) a military operation carried out cooperatively by two or more allied nations or a military operation carried out by coordination of sea, land, and air forces
[牵头 / 牽頭, qiān tǒuㄑㄧㄢ ㄊㄡˇ] lit. to lead (an animal by the head); to take the lead; to coordinate (a combined operation); to mediate; a go-between (e.g. marriage broker)#10772