As commander of HMS "Monarch", part of the fleet under commander Thomas Graves, Reynolds fought at the Battle of the Chesapeake in 1781. On 26 January 1782, Reynolds, commander of HMS "Monarch", was present at the Battle of Saint Kitts. On 12 April 1782, still in command of the "Monarch", serving under Admiral Sir George Rodney, Reynolds participated at the Battle of the Saintes.