WIN (OR EARN) ONE'S SPURS
Meaning of WIN (OR EARN) ONE'S SPURS in English
win ( or earn) one's spurs
historical
gain a knighthood by an act of bravery.
↘ informal gain one's first distinction or honours.
→ win
Concise Oxford English vocab.
Сжатый оксфордский словарь английского языка.
2004