Thousands of US soldiers depleted all of the beer in Iceland’s capital over the weekend.

More than 6,000 soldiers were in Reykjavik for four days participating in the Trident Juncture 18 — a NATO-led military exercise. After their drills, the troops reportedly visited the city’s downtown bars, where they finished off the entire beer supply.

According to Icelandic magazine Visir, the brewery Ölgerð Egils Skallagrímssonar had to send emergency cases of beer to the bars.

Bar owners reportedly said they have never experienced a situation similar to this before.

The soldiers first came into the port Wednesday night and left Sunday, but managed to drink the entire time they were visiting, Visir reported.

Since the soldiers departed, the bars have restocked their beer supply.