"The chairmen recognized the possibility that North Korea could conduct provocative actions during the Key Resolve, Foal Eagle exercise, or in connection with North Korean major political events in April," the statement said on Thursday.
On April 15, North Korea celebrates the birthday of Kim Il-sung, founder of the Democratic Republic of Korea. The national holiday is known as the Day of the Sun.
The Key Resolve and Foal Eagle 2017 exercise seeks to train US and South Korean forces to wage war against North Korea. The US Navy aircraft carrier Carl Vinson and Marine Corps F-35 combat jets will participate in the exercise.
Dunford noted that the US-South Korea alliance is ironclad regardless of the political situation in the country.