犄角之勢 [－－－势]

Jyutping gei1 gok3 zi1 sai3
Pinyin jī jiǎo zhī shì

Definitions (Wiktionary)
  1. phrase, idiomatic
    double-pronged attack; double-sided attack
  2. phrase, idiomatic
    to divide one's military forces into two separate groups so that one can attack on two different fronts