The text messages arrived on Chrissy Royal’s phone at 3:23 a.m.
“I got arrested [help] me,” said one.
Then: “Yongsan police station.”
It was a cool March night in Itaewon — a neon-lit nightlife district in central Seoul — and Royal’s husband Raymond had been out drinking with his best friend, Cory Anderson.
The men were U.S. army mechanics, and they had arranged to be deployed at the same time in South Korea. Pfc. Royal, 22, was based at the Yongsan Garrison, a major U.S. military base near Itaewon. Pfc. Anderson, 20, was stationed at Humphreys, a rural garrison 55 miles south, and he was visiting for the...