The United States has started to deploy the first elements of its advanced terminal high altitude area Defense Anti-Missile System to South Korea following North Korea’s Test Of four Ballistic Missiles.

Video provided by the U.S. Air Force showed Thaad parts arriving at the OSAN Airbase in Pyeongtaek, South Korea, on Monday.

The announcement by U.S. Pacific command came as North Korean state Media said Leader Kim Jong UN Personally Supervised Monday’s Missile Launches, stepping up Threats against Washington as U.S. Troops conduct joint Military Exercises with South Korea.

The move by the U.S. Military is likely to deepen the brewing conflict between South Korea and China, which says the Thaad deployment destroys the regional Security Balance.

The four Ballistic Missiles landed in the sea off Japan’s Northwest, angering Seoul and Tokyo, days after North Korea promised retaliation over the Military drills which it sees as preparation for war.