The Atlantic raid of June 1796 was a short campaign containing three connected minor naval engagements fought in the Western Approaches comprising Royal Navy efforts to eliminate a squadron of French frigates operating against British commerce during the French Revolutionary Wars. Although Royal Navy dominance in the Western Atlantic had been established, French commerce raiders operating on short cruises were having a damaging effect on British trade, and British frigate squadrons regularly patrolled from Cork in search of the raiders. One such squadron comprised the 36-gun frigates HMS Unicorn and HMS Santa Margarita, patrolling in the vicinity of the Scilly Isles, which encountered a French squadron comprising the frigates Tribune and Tamise and the corvette Légėre.

HMS Unicorn was a 32-gun fifth-rate Pallas-class frigate of the Royal Navy, launched in 1794 at Chatham. This frigate served in both the French Revolutionary Wars and the Napoleonic Wars, including a medal action early in her career. She was broken up in 1815.