“Mattis shared our views after being briefed about our position sufficiently,” said the official, adding that Mattis ordered his staff to review South Korea’s suggestion before the two countries held a Security Consultative Meeting later this month. 

The official added that the US was reluctant to carry out a massive exercise involving high-profile assets. Last year’s Vigilant Ace was held on the biggest-ever scale, involving US stealth fighters as a show of force against North Korea’s nuclear and missile tests.

Jeong, who had served as the Air Force Chief of Staff, told Mattis that the air drill doesn’t necessarily involve commitment of massive assets and thus the exercise did not have to be suspended altogether, according to the official.

“Given that the allies’ advanced command and control system, there is a way to conduct the exercise without putting all assets in one place,” said the official. “Minster Jeong told Mattis we could create similar effect even 10,000 kilometers away (from the training area).”

The remark came amid speculation over the difference in the timing and nuance of the suspension announcements. The Pentagon announced the suspension of Exercise Vigilant Ace on Friday, but it took about a day for the South Korean Defense Ministry to confirm its suspension.

In a message sent to reporters Saturday, the Defense Ministry said South Korea and the US agreed on various military options, including the suspension of Exercise Vigilant Ace, to support diplomatic efforts toward North Korea.

The official said a Pentagon spokesperson made the announcement, specifically using the word “suspension,” while Jeong and Mattis were engaged in bilateral consultations last week during a regional security meeting in Singapore.

Pentagon spokeswoman Dana White said Washington and Seoul suspended the air drill “to give the diplomatic process every opportunity to continue,” adding that Mattis and Jeong are “committed to modifying training exercises to ensure the readiness of our forces.”

By Yeo Jun-suk(jasonyeo@heraldcorp.com)