stick to one's guns
Definition from Wiktionary, the free dictionary
Military expression indicating bravery, diligence, and persistence of gunners faithfully attending their cannons under fire.
- 1970 Henderson, James, The Frigates, an account of the lesser warships of the wars from 1793 to 1815. London: Wordsworth, p73:
- Capitan Beaulieu-de-Long and his first lieutenant were both killed, several guns dismounted, and many of the [French frigate] crew killed and wounded; nevertheless the Forte kept up a furious and long-continued cannonade. [... every shot of the English frigate] Sybille [...] crashed into the hull of the Forte. Nevertheless the French stuck bravely to their guns, while the flame of the cannonade illuminated the scene beneath the canopy of smoke.