The U.S. has deployed 3,000 troops and 750 pieces of heavy equipment into Eastern Europe as part of a planned buildup to increase NATO defenses, the Pentagon announced Monday.

Troops from the 1st Armor Brigade Combat Team, 3rd Infantry Division and their complement of tanks, vehicles, artillery and helicopters arrived in Latvia Monday via ship, said Pentagon spokesman Col. Steve Warren.

The troops, from Fort Stewart, Georgia, are expected to conduct exercises in Estonia, Lithuania and Latvia for the next 90 days.

The heavy equipment is scheduled to remain in Europe as part of a planned buildup of satellite sites throughout Eastern Europe.

The U.S. has committed to deploying to a series of NATO outposts in Eastern Europe to further insulate them from any additional Russian aggression.