The largest armed US military brigade to be deployed to Europe since the end of the Cold War arrived on Saturday at a port in northern Germany.

The US Army’s 3rd Armored Brigade Combat Team, 4th Infantry Division arrived in the port of Bremerhaven on Friday and began a days-long process of deploying heavy equipment, including tanks and armored vehicles, UPI reported.

The deployment is the culmination of a promised heavier armed troop presence in Eastern Europe since the Russian annexation of Crimea in 2014.

The move was meant to reassure nervous NATO allies the United States was prepared to respond in the event of further Russian aggression in the region.

The arrival of the 3,500-troop heavy brigade is part of Operation Atlantic Resolve. The Army has maintained troop deployments in the region for decades, but had allowed their numbers to lapse for months at a time as troops were rotated out of Europe without being replaced.

Stars and Stripes reported the Pentagon plans to maintain the full deployment and immediately replace returning soldiers after their nine-month deployments are completed.

The troops will meet in Poland and eventually will be deployed there, as well as Romania, Bulgaria, Germany and across the Baltics. Once there, they will engage in training exercises with NATO host nations.

The US is not the only NATO member to beef up deployments in Eastern Europe. Britain has deployed fighter jets to patrol the Black Sea and a division of French and Danish troops are being deployed to Estonia.

Germany is also expected to contribute additional forces to the region.