Washington's nuclear-powered aircraft carrier Nimitz, one of the world's largest warships, is taking part in the two-day joint naval exercises off South Korea's east coast.
The Nimitz Strike Group consists of the 97,ton USS Nimitz and guided missile destroyers and cruisers.
For the exercises, the South Korean Navy is mobilizing the Aegis-equipped destroyer King Sejong and class destroyer Chungmugong Yi Sunshin.
This drill will bring an end to military exercises between the South Korea-U.S. Combined Forces, which wrapped up the Key Resolve and Foal Eagle drills earlier this year.
"North Korea has not gained anything from making war threats this time. So it could make a military provocation to get something. To deter Pyongyang from doing that, the U.S. has sent the Nimitz warship."
Using Aegis destroyers, the South Korean and U.S. navies plan to focus on missile detection and anti-submarine maneuvers.
The Combined Forces Command says this drill aims to further enhance military readiness and interoperability between the allies.
On Saturday, Pyongyang denounced the arrival of the Nimitz at the southern port city of Busan calling it a grave military provocation.
"South Korean President Park Geun-hye talked about the so-called "trustpolitik" and bringing about peace in Northeast Asia while in Washington. But now we all know that those were just words from the very entity destroying peace and stability in the region, aimed at disguising the true warmonger."
However, Rear Admiral Michael White, Commander of the Nimitz Strike Group, stressed the naval drill is part of routine training adding the two navies perform 15 to 16 joint exercises a year.
Kim Yeon-ji, Arirang News.