Define "peaceful" since the Congo Wars or Africa's World Wars didn't end until 2008.
"U.S. a factor in 6 million Congo deaths"
"in 1996, the U.S. backed Kagame, who had become president of Rwanda with U.S. help, in his invasion of the Congo. The result has been the greatest mass killing since WWII, with around 6 million killed in the Congo since that time."
https://peoplesworld.org/article/us-a-factor-in-six-million-congo-deaths/