The United States and South Korea announced plans for major annual joint military exercises as regional tensions run high following North Korea's third nuclear test.
A joint air, ground and naval field training exercise known as Foal Eagle will be held from March 1st to April 30th.
Separately, US and South Korean troops will stage a computer-simulated drill named Key Resolve from March 11th to 21st .
Pyongyang habitually denounces the joint drills as a rehearsal for invasion.
Seoul and Washington insist the manoeuvres are defensive in nature.