Posted : 2021-02-14 10:52 Updated : 2021-02-14 14:01 South Korean marines participate in the Amphibious Operations during the annual South Korea-U.S. combined Foal Eagle exercise against a possible attack from North Korea in Pohang in April 2017. EPA-Yonhap South Korea and the United States are preparing to hold their annual springtime combined military exercise next month, sources said Sunday. The planned exercise has drawn keen attention amid concern that North Korea could use the exercise as a pretext for provocations in the early months of the administration of U.S. President Joe Biden. Pyongyang has long denounced such drills as a rehearsal for invasion.