According to certain media sources, this tended situation on the Western sea is due to the permanent presence of United States soldiers on South Korea. North Korea fired several tens of artillery shell on the South Korean island of Yenpyeong, this Tuesday, November 23, 2010.
Following the death of civilians bombarded leave the Korean forces north since the war Korea (1950-1953), South Korea decided to reinforce its average soldiers, of which the sending of ground forces, in five of its islands of the Western sea, near to the North Korea.

Earlier, the North Korea had announced that it was ready to strike again South Korea, indicating that it was its neighbour who had opened the hostilities.

The United States sent aircraft carrier towards South Korea within the framework of air and sea military exercises. For the government of South Korea, these operations have only a goal of dissuasion against the North Korea.
China expressed a regret concerning deaths caused by the North Korean bombardment, but declares itself worried by the next joint Air Sea military exercises of United States and South Korea.