| Conflict: | Action of 11 March 1727 |
| Partof: | the Anglo-Spanish War (1727–1729) |
| Date: | 11 March 1727 |
| Place: | Off Cadiz, Atlantic Ocean |
| Result: | British victory |
| Combatant2: | Spain |
| Commander1: | George Forbes |
| Commander2: | Unknown |
| Strength1: | 2 ships of the line |
| Strength2: | 1 frigate |
| Casualties1: | Light |
| Casualties2: | 200 killed or wounded 1 frigate captured |
The action of 11 March 1727 was a minor naval engagement of the Anglo-Spanish War.
On 11 March the brand new Spanish 46-gun fifth-rate warship Nuestra Senor Del Rosario was out on sea trials after just being fully completed. The ship was on a journey bound from Santander to Cadiz. Meanwhile, detached on a cruise with from the main body of a Royal Naval squadron reinforcing Gibraltar from a Spanish siege.
They sighted the Spanish frigate near the port of Cadiz and gave chase. Soon Royal Oak caught up, and after a few broadsides the Spanish warship soon surrendered. Canterbury was not able to get up till just as the Spanish surrendered. The prize was carried with the rest of the squadron, which managed to slip past the besieging Spanish forces to relieve Gibraltar on the 13 March.[1]