In 2013, then 77-year-old Marie Ann Han Yoo was moving out of her home in Memphis when she and her family came across a strange-looking suitcase gathering dust in a closet. Old and gray, it looked as though it hadn’t been touched in years.

“The suitcase was from Korea,” recalled Yoo’s daughter, Stephanie Han. “And it was filled with slides.”

The slides revealed rare color photographs of life in South Korea as it began to rebuild after the Korean War, a brutal three-year conflict that killed some five million people, more than half of them civilians. The subjects of the photographer’s gaze were ordinary people, for the most part: a woman wearing a bright pink hanbok outside a city bus