The U.S. military must rebuild in Europe to face a more aggressive Russia, whose advanced submarines, weapons systems and geographic advantage have the U.S. “playing zone defense,†the top U.S. commander in Europe said Thursday. “We have about 20 years of a different paradigm to correct,†Gen. Philip Breedlove, commander of U.S. European Command, said during testimony before the House Armed Services Committee. Breedlove, who has led EUCOM during the command’s biggest transformation in a generation, said he did not foresee a need to return to a Cold War-style military posture. But the era of trying to make a partner...