In case you forgot, the Koreas are (technically) still at war with each other. Just this morning, the North sent over 100 live artillery rounds towards the South… and what does the South do? They respond with over 300. Luckily, nobody was hurt and they were basically just flexing on each other.
All this happened in the midst of the Ssang Yong exercises. In a nutshell, it’s an annual thing where South Korea and its ally the United States get together to demonstrate their unity, preparedness, and strength. So yeah, North Korea’s probably a little annoyed. Let’s hope it doesn’t escalate into anything beyond what’s already happened.