The most famous Irish action of the operation was the Siege of Jadotville where 150 Irish troops of "A" Company, 35th Battalion, held out against a much larger force of 3,000-5,000 Belgian, French, and Rhodesian led Katanga mercenaries and irregulars. The Irish fought until their ammunition ran out, inflicting hundreds of casualties on their opponents while suffering only several wounded. However, an attempt by Irish and Swedish reinforcements to relieve them failed, and in the end, the besieged Irish troops were forced to surrender.