Chéngjísīhán de qíbīng xiāoyǒng-shànzhàn, jiànlì le yí ge pángdà de dìguó.
Genghis Khan's cavalry, fierce and skilled in battle, built a vast empire.
Tips
usage
Stock praise for generals, soldiers and armies in histories, historical novels and games. A close modern variant is 英勇善战 "heroic and skilled in battle", often used of the army in official writing.