Sailing vessels still performed combat work in both world wars

When was the last sailing warship built or converted for fighting rather than training?

Depending on the definition of fighting, examples survive into the First or even Second World War.

A German sailing surface raider provides a clear First World War example of an armed sailing vessel still conducting combat operations. The boundary extends into the Second World War if covert transport and armed auxiliary work count as fighting. Some sailing craft operated under medical or extraction descriptions while carrying conspicuously healthy armed personnel. The date therefore depends on the definition of warship and combat service rather than on the disappearance of sails alone.