The Pentagon is sending tanks, armored vehicles and containers full of other military gear to caves in Norway. It’s all for the U.S. Marine Corps, which wants to update and expand its Scandinavian stockpile.

The Corps has stashed weapons and equipment in the Norwegian countryside since the 1980s. With this setup, Marines can fly in and be ready for a fight in no time.

In addition, the Pentagon saves money by not having to keep a large force in Norway year-round. Washington already spends billions each year running huge bases across Europe.

But in the past, Marines rushing toward the sound of gunfire might have lacked firepower. Five years ago, Humvees with machine guns and missiles were the only combat vehicles in Norwegian storage, according to tables in an official Marine Corps handbook.

Now, the military is adding M-1A1 Abrams tanks and a number of Assault Breacher Vehicles to the bunkers. The latter are heavily armored tracks designed to blow up minefields and push through other obstacles.

The Pentagon is also adding M-88 tank retrievers, amphibious assault vehicles, up-armored Humvees and various upgraded trucks to the cache. The Corps expects to finish moving the new materiel under the mountains by the end of the month.