The US has three aircraft carriers in the Pacific amid soaring tensions with North Korea.

The US Navy says the deployment of the USS Nimitz, the third carrier, was previously planned, but the US Navy has been busy near Korea.

The US, South Korea, and Japan just wrapped up a missile-defense drill in the region, and North Korea remains quiet for now.

The USS Nimitz aircraft carrier and its accompanying strike group of destroyers have left the Middle East, where they had launched airstrikes against ISIS, to back up US forces in the Pacific, the US Navy announced on Wednesday.

The Navy says the Nimitz is heading to the Pacific on a previously scheduled visit, but it will be the third carrier in the region joining the USS Ronald Reagan, which stays in Japan year-round, and the USS Theodore Roosevelt, which is currently in the Pacific well east of Japan.

According to the Navy, the Nimitz just finished three months fighting ISIS, with over 903 bombs dropped. ISIS fighters are now surrendering en masse as US-backed regional forces close in on them.

Gen. Jeong Kyeong-doo, chairman of South Korea's Joint Chiefs of Staff, and US Forces Korea chief Army Gen. Vincent Brooks met aboard the Reagan after the drills, with Jeong saying that the carrier sent a "strong warning" to North Korea "amid an unprecedentedly grave security situation," according to Yonhap news.

The US, South Korea, and Japan just concluded a missile-defense drill near Korea with their cutting-edge naval-defense platforms. The drill focused on improving situational awareness and readiness while North Korea threatens to send more missiles flying over Japan.

The guided-missile destroyer USS Chung-Hoon fires an SM-2 missile during a live-fire exercise. Mass Communication Specialist 3rd Class Jonathan Jiang/USN

Despite North Korea's talk of firing missiles at Guam or into the Pacific, the country remains quiet. Pyongyang hasn't launched a missile in over a month, marking the longest period of relative quiet since its first missile launch in February.

But a recent report states that North Korea has remained resolute and unwilling to talk to the US. Meanwhile, President Donald Trump seems intent on hinting at the possibility of war whenever possible.