The visit comes amid rising tensions with Russia and follows renewed NATO efforts to strengthen Eastern European defenses. Reuters reported that the Prince joined British soldiers in a Challenger 2 tank and a Warrior armored vehicle during a training exercise.

UK troops lead a battlegroup in Estonia and the 900 British service personnel in the country are the UK’s largest permanent overseas deployment.

The historic visit emphasized William's role in international relations, and though much focused on military operations and Estonian-Ukrainian relations, the royal still got a few jokes in. “How’s it working with the Brits?