An earlier version of this article incorrectly stated that the UN started the Department of Peacekeeping Operations (DPKO) in 1948. The UN started deploying peacekeepers in 1948, but didn’t set up DPKO until 1992. This has been corrected. The article has also been updated to clarify that Kathryn Bolkovac worked for the British subsidiary of the American firm DynCorp International. UN peacekeepers