North Korea's latest rocket launches are a symbolic display of disapproval of military cooperation between South Korea, the U.S., and other allies in Asia.

For the Trump administration, it was a duo of firsts on the Korean Peninsula on Monday: the first South Korea-U.S. joint military drills and North Korea’s first missile barrage.

North Korea condemned an ongoing U.S.-South Korea joint military exercise Wednesday, saying another incident like Seoul's recent accidental bombing of its own village near the DMZ could lead to "a new armed conflict.

U.S. Freedom Shield exercise on Wednesday, citing the South Korean Air Force's recent accidental bombing of a civilian area near the inter-Korean frontier.