The first Swedish UN battalion in Sinai in 1956 was named Battalion 1. This numbering continued from Battalion 1 to Battalion 9 which was initially deployed in the Sinai and later in Gaza. After Battalion 9 the numbering was changed to include only odd numbers starting with 11 and with additional letter G for Gaza. Battalion 8 was transferred from Gaza to the Congo and then took the name Battalion VIII K (Kongo (Congo)). So, seven of the Congo battalions, 10 to 22, were recruited to serve in ONUC, while the other two were Gaza battalions transferred to the Congo as reinforcements.