The United States and South Korea have agreed to suspend a joint military exercise scheduled for August, South Korean and U.S. officials said on Monday, following President Donald Trump’s pledge to end “war games” after his summit with North Korean leader Kim Jong-un last week.

“South Korea and the United States have agreed to suspend all planning activities regarding the Freedom Guardian military drill scheduled for August,” according to a South Korean defence ministry statement.

A Pentagon statement confirmed the suspension and added that there would be a meeting between the secretaries of defence and state as well as Trump’s national security adviser on the issue this week.

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“We are still co-ordinating additional actions. No decisions on subsequent war games have been made,” Pentagon spokeswoman Dana White said.

Last year, 17,500 American and more than 50,000 South Korean troops participated in the Ulchi Freedom Guardian drills, although the exercise is mostly focused on computerized simulations rather than live field exercises that use weapons, tanks or aircraft.

The U.S.-South Korean exercise calendar hits a high point every spring with the Foal Eagle and Max Thunder drills, which both wrapped up last month.

The decision to halt military exercises in South Korea has bewildered many current and former U.S. defence officials, who only learned about it when Trump made his remarks.

COST OF DRILLS?

The Pentagon has yet to publicly release the cost of previous and future joint military exercises with South Korea, a week after Trump cited their “tremendously expensive” cost as a reason for halting them.

Spending data for previous military exercises in Korea and elsewhere, however, suggest that the cost of a single exercise would be in the low or perhaps tens of millions of dollars in a U.S. military budget this year of nearly $700-billion.

In response to repeated requests for cost data, Pentagon spokesman Lieutenant Colonel Christopher Logan, said: ”We are currently evaluating the costs of the exercises.”

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Calculating the cost of military exercises is a complicated process, often requiring data from different branches of the military and spread over several budgets over different years.

Troops who would have been involved in the exercises would still require training and certification, which would still cost money, said Abraham Denmark, a former deputy assistant secretary of defence for East Asia under President Barack Obama.

“To me, the idea of this as a cost saving measure doesn’t really make much sense,” Denmark said.