With a grueling four-day mission through the forests of Slagelse now complete, Crown Prince Christian is now a Hussar Guard.

The Danish Royal Court shared a video of the future king’s final training mission—the REX mission—which took place from 12-16 May. In the video, the Hussar Guard Regiment’s leaders are shown waking up the recruits. Crown Prince Christian narrates, saying, “Early in the morning our commander came and knocked on the door and screamed ‘OUT THE CORRIDOR!’”

The REX mission involves very little sleep or food. The conscripts get a two-hour break maybe once or twice a day and are only given one field ration that is meant for one day. A field cooking session is conducted to teach conscripts how to prepare fish and vegetables primitively.

According to the Danish Royal Court, a REX mission changes from team to team and conscripts never know in advance what theirs will entail. The four-day mission is broken into two segments of 48 hours each; the first includes being activated and deployed with little notice and the second is problem-solving. Over a 36-hour period, conscripts travel roughly 50 kilometres with 25-30kg of equipment and weapons.

Part of Crown Prince Christian’s REX mission involved patrolling and reconnaissance tasks. He then narrates a portion of the film that takes place in the middle of the mission. He says that the REX mission has been “nice so far” and that he’s unsure of where he is, exactly, “but it’s really beautiful.” The lack of sleep and minimal food has been, by his estimation, the hardest part, but “I expect that we’ll be pushed in some aspects and other things where we’ll be a little more challenged. But we know that we can still do it.”

The final day of the REX mission involved physical and mental exercises, including navigating a battlefield simulation. After the REX mission was complete, Crown Prince Christian received his REX badge with the rest of his team. He said, “I’m very proud, touched and delighted that I can get permission, and that I’ve come through it together with my platoon.”

He added: “I was actually a little nervous, and then I was just super proud. And it’s something I’ve been looking forward to for a really, really long time.”

The Danish Royal Court confirmed that the future king’s basic training will conclude at the end of May, and that he will begin Lieutenant’ Training in August. “I’m really looking forward to that,” Crown Prince Christian said.

The Lieutenant’s Training lasts a year and will be followed by practical experience as a platoon leader.