South Korean and U.S. marines hold a massive amphibious landing exercise in the southern port city of Pohang on Monday involving 12,000 troops.
A military spokesman on Sunday said a large landing vessel from the Seventh U.S. Fleet and another from the South Korean Navy will take part in the landing drill, which is open to press observers.
Around 9,500 U.S. Marines and sailors as well as 3,000 South Korean Marines and sailors take part in the largest joint military drill since the Team Spirit exercises that took place each year until 1993.
The U.S. has cut down on large-scale drills due to budgetary restraints, but this is an exception.
A military source said the drill "demonstrates the will of the U.S. government and our military to deter North Korean provocations."