North Korean leader Kim Jong Un said his military should “thoroughly annihilate” the United States and South Korea if provoked, state media reported Monday, after he vowed to boost national defense to cope with what he called an unprecedented U.S.-led confrontation.

North Korea has increased its warlike rhetoric in recent months in response to an expansion of U.S.-South Korean military drills. Experts expect Kim will continue to escalate his rhetoric and weapons tests because he likely believes he can use heightened tensions to wrest U.S. concessions if former President Donald Trump wins the U.S. presidential election in November.

In a five-day major ruling party meeting last week, Kim said he will launch three more military spy satellites, produce more nuclear materials and develop attack drones this year in what observers say is an attempt to increase his leverage in future diplomacy with the U.S.