Marika Griehsel is the director of the documentary "Kongoveteranerna," or the Kongo Veterans. It tells the story of the more than 6,000 Swedes who served as peacekeepers during the four-year UN mission at a time when Sweden's Dag Hammarskjöld was UN Secretary General.
In 1960, Congo was on the verge of independence and chaos. The Congolese army had rebelled against the nation's elected leadership and a mineral-rich province in the south had seceded.
The Swedish peacekeepers were sent to ease the growing tension but many of them weren't ready for what happened.
Within the first year, Swedish soldiers were killed in the Congo. A total of 19 Swedes died during the operation and dozens were wounded. And those returning to Sweden weren't given a warm welcome but told to keep quiet.
The documentary can be seen online here.