The Pentagon announced Tuesday that it has reduced the number of U.S. combat brigades deployed in Europe from four to three, returning troop levels to those seen in 2021 amid continued pressure on European allies to strengthen their own defenses.

According to the Pentagon, the move has caused a “temporary delay” in the deployment of American forces to Poland. A combat brigade typically includes between 4,000 and 4,700 soldiers, according to a U.S. Congressional report.

U.S. Vice President previously stated that the planned deployment of 4,000 troops to Poland had been postponed rather than canceled, emphasizing that Europe should rely more on itself for defense.

The Pentagon added that the final status of U.S. forces in Europe will depend on further assessments of American strategic and operational requirements, as well as the ability of European allies to contribute more to the continent’s defense.

The announcement comes amid growing uncertainty over the future of U.S. military presence in Europe and increasing calls from Washington for NATO allies to boost defense spending. Earlier this month, the Pentagon also announced plans to withdraw 5,000 troops from Germany.