Seoul, South Korea — South Korea scrambled dozens of military aircraft, including advanced F-35 fighter jets, after tracking about 180 flights by North Korean warplanes inside North Korean territory in what appeared to be a defiant show of strength. North Korea‘s aerial exercises came after the it test-fired around 30 ballistic missiles over the two previous days, including an intercontinental ballistic missile on Thursday that triggered evacuation warnings in Japan, in an angry response to U.S.-South Korea joint air force drills involving hundreds of their warplanes.

South Korea’s Joint Chiefs of Staff said the North Korean warplanes were detected in various areas inland and along the country’s eastern and western coasts but didn’t come particularly close to the inter-Korean border.

None of the planes breached the South Korean military’s virtual “tactical action” line 12 to 31 miles north of the Koreas’ land and sea boundaries for monitoring purposes to give the South enough time to respond to provocations or attacks.

South Korea still scrambled about 80 of its own warplanes, including an unspecified number of F-35 fighters. There…