The US unveiled large scale drills in the region jointly with South Korea in order "to enable the combined defense" against North Korea's threat, US military Marc Dalton was quoted by NTD.tv as saying.
The 100,000-ton USS Ronald Reagan warship was involved in massive drills that started on October 15 and ended this Friday, which also included fighter jets, helicopters, as well as naval ships and submarines.
The aircraft carrier sailed into the South Korean port after patrolling waters east of the Korean Peninsula earlier in the week.
Commenting on the drills, the North Korean state run news agency KCNA warned on Thursday that Pyongyang could stage an unprecedented strike on the US at an unexpected time.
Furthermore, Kim Jong-un has vowed to take the "hardest ever countermeasures" against Washington, as Trump threatened to "totally destroy" his country.
The tensions between the two countries soared amid North Korea's growing nuclear and missile activities. Pyongyang fired two intercontinental ballistic missiles in July and conducted its sixth and most powerful nuclear test in September.
