Danish Prime Minister Mette Frederiksen said the revised policy was designed to increase the number of young people doing military service.
Conscripts will also be expected to serve more time in the military - 11 months, compared with four months at the moment.
"We are not rearming because we want war, destruction, or suffering. We are rearming right now to avoid war and in a world where the international order is being challenged," Frederiksen told reporters on Wednesday, indirectly referring to Russia's military moves in recent years and months.
Comment: The 'international order' is not only being challenged from the outside, but it's fracturing from the inside too: Orban: EU leadership should 'start trembling, Brussels is not the first empire that has set its eyes on Hungary. It's time to rise up!'
Comment: This seems to reflect not only the desperation felt by the Western establishment, but also the utter disdain they have for the native peoples, and their future: Schools should prep students for 'natural disasters and war', says Germany's education minister