MADRID—The U.S. will make its biggest military expansion in Europe since the Cold War, including its first permanent troop presence in Poland, as NATO prepares for two more members to join the alliance in response to Russia’s invasion of Ukraine.
The announcement, which follows a NATO pledge this week to increase its high-readiness forces sevenfold, comes despite Washington’s efforts to shift U.S. attention toward China and offers fresh evidence how Russia’s war is upending international security.
