When a sailor is impressed by an enemy what does that mean?

When a sailor is impressed by an enemy, it typically means they have been captured or forced into service by that enemy, often against their will. This practice, historically common in naval warfare, involved taking sailors from one ship to serve on another, especially during times of conflict. The term "impressment" is often associated with the British Royal Navy's practice of forcibly recruiting sailors from merchant ships in the 18th and early 19th centuries.