5 Apr, 03:30··
Battle of Yeonpyeong

In November 2010, South Korean forces conducted military exercises near the island of Yeonpyeong, which is controlled by South Korea but close to North Korea. North Korea responded with an attack on the island, resulting in casualties and prompting a counterattack. The event highlighted the ongoing tensions and military capabilities of both nations.
Summarized from the sources above. Read the originals for the full story.
militarytensionnorth korea