SEOUL, SOUTH KOREA: South Korea and the US are eliminating their massive springtime military drills and replacing them with smaller exercises as part of efforts to support diplomacy aimed at resolving the Nh Korean nuclear crisis.

The decision announced by both countries Sunday is an olive branch to North Korea. But it will likely raise worries about how the allies will maintain their readiness in the event that military tensions erupt again in the wake of the recently failed summit between President Donald Trump and North Korean leader Kim Jong Un.

The Pentagon said in a release the US and South Korean defense chiefs decided to conclude the Key Resolve and Foal Eagle series of exercises.

It said the allies agreed to maintain firm military readiness through newly designed command post exercises and revised field training programs.

Acting US Secretary of Defense Patrick Shanahan and South Korean Defense Minister Jeong Kyeong-doo “made clear that the alliance decision to adapt our training program reflected our desire to reduce tension and support our diplomatic efforts to achieve complete denuclearization of the Korean Peninsula in a final, fully verified manner,” the statement said.

Seoul’s Defense Ministry released a similar statement.

According to US officials, the new training will be done in smaller drills, tabletop exercises and simulations, and it will involve smaller units, such as battalions and companies rather than massive formations involving thousands of troops, as they had in the past.

Officials said the Pentagon will focus on smaller exercises and mission essential tasks, which include the ability to integrate airstrikes and the use of other weapons systems, drones, surveillance assets, logistics, and communications.

Last November, a month before he resigned as defense secretary, Jim Mattis disclosed that the US and South Korea would scale back and tone down the spring exercises. He said the aim was to avoid setting back diplomacy over North Korea’s nuclear weapons. He described it as a reorganization of the exercises, not an end to maneuvers on the peninsula.

Trump has long complained about the cost of military drills with South Korea.

After his second summit with Kim ended without any agreement in Hanoi on Thursday, Trump complained about the cost of annual military drills. “It’s a very, very expensive thing and we do have to think about that, too,” Trump told reporters.

Following his first summit Kim in Singapore last June, Trump caught many in the US and South Korea by surprise by suspending the allies’ summertime military drills. He called the Ulchi Freedom Guaridan drills — largely computer-simulated war games — “very provocative” and “massively expensive.”

The US and South Korea also have since suspended a few other smaller joint drills.

The end of the springtime war games will benefit North Korea, which has described them as a rehearsal for invasion and responded with its own costly military exercises and weapons tests, including firing a new intermediate-range missile over Japan last year.

The Korean Peninsula remains in a technical state of war because the 1950-53 Korean War ended with an armistice, not a peace treaty. About 28,500 American soldiers are deployed in South Korea to deter potential aggression from North Korea.