The Action of 18 April 1695 refers to an incident where an English frigate by the name of Sea-horse demanded that the Swedish man of war Wachtmeister lower its topsail on 18 April 1695, after the refusal of the Wachtmeister, a firefight broke out, resulting in the Sea-horse retreating and the Dano-Swedish convoy emerging victorious.

In the English channel, off the coast of Sussex, a Dano-Swedish convoy fleet of 180 Swedish and Danish merchant ships, led by the Wachtmeister met an English frigate on 18 April.

The English frigate, named the Seahorse began inspecting the merchant ships, and then demanded one of the ships salute it, which was promptly refused, with the answer that the ship behind it would give them the reason for it, which happened to be the Wachtmeister[1][2][3] When the English captain, Anthony Tollet[4] sent his boat onboard the Wachtmeister to know the reason for the refusal to strike their sail, the Swedish captain, Gustaf Wattrang, sent his Lieutenant on board the Seahorse to tell him that the Swedes had orders to not strike to any ship in the world, especially such a "diminutive" one.

Wattrang then directed the Wachtmeister towards the Englishmen, delivering a broadside, leading to a firefight that lasted for more than 3–4 hours.

[1][2][5] Since the Seahorse was significantly smaller than the Wachtmeister, it was eventually forced to give up, and retreated, leaving the Dano-Swedish convoy victorious in the battle.