Princess Anne took the opportunity to take a tour inside a British Challenger 2 battle tank during a visit to the Tapa Base in Estonia.
During her time at the military base, she met with troops from the UK, Estonia and Denmark deployed as part of Nato's Multinational Battlegroup in the country.
Princess Anne is the Honorary Colonel of the King's Royal Hussars that is equipped with the Challenger 2 and currently serving in Tapa.
The King's Royal Hussars (KRH) is a Royal Armoured Corps regiment of the British Army, and the Princess Royal has been their Colonel-in-Chief since its formation in 1992.
The regiment is currently part of Operation Cabrit, which is the codename for the UK's deployment and contribution to Nato's enhanced Forward Presence (eFP) mission which is designed to deter adversaries.
Princess Anne, accompanied by husband Vice Admiral Sir Tim Laurence, arrived in Estonia on Tuesday and met with Estonian President Alar Karis.
Mr Karis was "honoured" to welcome the Princess and said the two countries have a "longstanding friendship" and "excellent co-operation".
He added in a tweet: "Highly appreciate UK's contribution in bolstering Nato's posture in our region, proud to host King's Royal Hussar's here."