Rishi Sunak made headlines this week when he promised to bring back national service if the Conservatives win the next election.
The plan didn’t go down too well with the other parties.
But many parts of Europe have welcomed the idea, with forms of conscription in place for decades.
While Estonia has just made defence training mandatory in all secondary schools.
It’s another sign of how Russia’s war in Ukraine is forcing countries to prepare for an uncertain future.
Produced by Nina Hodgson, filmed and edited by Matthew Lucas.