The 8th US army said in a statement it would test-fly its new "Shadow-200" unmanned surveillance planes from a military base near the border Friday.
It said the system was to "contribute to the overall deterrence US forces brings to the alliance" with South Korea by offering "real time, accurate and relevant intelligence of the battle field."
It is "part of the planned 11 billion dollar investment over the next several years in some 150 programs to enhance US defensive capabilities in support of...US forces (in) Korea," it said.
The United States said last week it was upgrading its missile defense capabilities in South Korea to the Patriot Advanced Capability-3 (PAC-3) from
North Korea has denounced the US military build-up as war provocations, demanding that Washington stop its hostile policy towards the communist state.
Some 37,000 American troops are stationed in South Korea to thwart North Korea's military threat.
The two Koreas have been technically at war since the 1950-1953 Korean conflict which ended in a fragile armistice, rather than a peace treaty.