The Aug. 18-28 exercise may trigger an angry reaction from North Korea, which calls the joint drills invasion rehearsals.

South Korea and the United States are set to commence their annual large-scale military exercise this month, a move designed to bolster readiness against escalating North Korean threats. The joint drills are, however, likely to provoke an angry response from Pyongyang, further straining diplomatic efforts.

South Korea and the United States will conduct major joint military drills starting on August 18, officials said, although they will delay parts of the annual exercises that have been a source of tension with North Korea to later in the year.