The action of 18 June 1799 was a naval engagement of the French Revolutionary Wars fought off Toulon in the wake of the Mediterranean campaign of 1798. A frigate squadron under Rear-admiral Perrée, returning to Toulon from Syria, met a 30-ship British fleet under Lord Keith. Three ships of the line and two frigates detached from the British squadron, and a 28-hour running battle ensued. When the British ships overhauled them, the French frigates and brigs had no choice but to surrender, given their opponents' overwhelming strength.