ALL THIS, AND WORLD WAR II: As Finland considers NATO membership, citizens mobilize for an invasion by Russia.

When the Finnish Reservists’ Assn. recently announced wartime defense courses for civilian women in the southern town of Haemeenlinna, the 400 slots filled almost immediately, with a waiting list of 500 more.

Topics will include shooting, cybersecurity and how to manage the first several days of an invasion from abroad.

“I wouldn’t call it fear,” said Sgt. Sonja Airikki, a 39-year-old reservist who will lead the training next month. “It’s more about being prepared.”

Military readiness is ingrained in the culture of this country of 5.5 million people that shares an 833-mile border and a long, complicated history with Russia.

The relationship has grown increasingly tense since Russia invaded Ukraine two months ago. For the first time, Finland is considering seeking membership in NATO, prompting threats of retaliation from Russian President Vladimir Putin.

Putin really does consider himself the second coming of Stalin, doesn’t he?