Korea conducted a joint military drill off the coasts of Uleung Island and Dokdo Wednesday aimed at assessing preparedness to protect the Dokdo islets from foreign aggression.

For the exercise, the Navy’s First Fleet employed eight war vessels, two fighter jets, one anti-submarine helicopter and one offshore patrol helicopter.

In the drill, the Coast Guard, Navy and the Air Force jointly repelled the simulated infiltration of a ship in waters around the islets.

This is the first time the military revealed the schedule of the drill in advance.

The Navy conducts two Dokdo defense drills a year.