Polish Defense Minister Mariusz Blaszczak at a ceremony for the delivery of 14 US-made Abrams tanks in Szczecin on June 28.Polish Foreign Ministry/Anadolu Agency via Getty Images Poland is on a spending spree to build what it describes as "the largest land force in Europe." Among its purchases are US-made tanks and helicopters designed to work in tandem on the battlefield. Warsaw's military buildup comes in response to rising tensions in Europe amid the war in Ukraine As Eastern Europe rearms in response to Russia's invasion of Ukraine, Poland is emerging as a regional military powerhouse.Despite only being a member of NATO since 1999, Poland is spending much more than older alliance members.