As many as 10,000 U.S. service members would end up wounded or dead in the opening days of a potential war with North Korea, with civilian casualties possibly reaching into the hundreds of thousands, says a recent U.S. military assessment of a future conflict on the peninsula. The casualty assessment was one of several generated during a large-scale vitrual wargame, known as a tabletop exercise in Pentagon parlance, conducted by several service and combatant commanders including Army Chief of Staff Gen. Mark Milley and U.S. Special Operations Command chief Gen. Tony Thomas, The New York Times reported Thursday. The wargame, held at U.S. Pacific Command’s headquarters in Hawaii, put on stark display the devastating cost of engaging in all-out war with the North Korean regime. “The brutality of this will be beyond the experience of any living soldier,” Gen. Milley reportedly said after seeing the results of the exercise, according to The Times. Results of the recent wargame come as the White House continues raising tensions in the region, touting the fact that all options — including military action — remain on the table in an effort to curb Pyongyang’s nuclear ambitions. Officials within the Trump administration have also suggested a series of non-nuclear, preemptive strikes dubbed the “bloody nose”option to force the North to ratchet down their actions. Goodwill generated between Pyongyang, Seoul and the U.S. as a result of the recent Olympic games prompted Mr. Trump to suggest his administration would be open to some form of talks with the North Korean regime. That said, Washington remains intent on moving forward with this year’s Foal Eagle exercises, in spite of claims by Pyongyang that such a move could have a chilling effect on those seemingly warming relations. U.S. and South Korean commanders are in the process of zeroing in on a start date for the exercise, known as Foal Eagle, after being forced to postpone the drill due to the Olympics, Pentagon spokesman Col. Rob Manning told reporters Monday. He declined to comment on what dates both countries were considering for the exercise, one of the largest military drills in the world, but noted “it will be an alliance decision when that [exercise] will occur,” Col. Manning told reporters at the Pentagon. Officials in Pyongyang warned that any military drills set to take place after the games in Pyeongchang, South Korea, “seriously threatened, and hard-won atmosphere for reconciliation and cooperation between the north and the south were spoilt in a moment,” according to a statement issued on state-run media outlet Korean Central News Agency last week.