"Supported by:" . "1 reconnaissance aircraft damaged" . "14,000\u201317,000 gendarmes" . "~13,000 troops" . "a strong counter-offensive" . . "Operation Grandslam" . . . . . . . "300\u2013500 mercenaries" . . . . "Sweden" . . "*25pxEthiopia" . "* Katangese secession formally ended on 17 January" . . "''Grandslam''" . "7 fighter aircraft damaged" . . . . "end of the Katangese secession" . . "*" . "12 combat aircraft" . "27\u201377 wounded" . "Operation ''Grandslam''" . "10\u201311 killed" . . "1962-12-28" . "ONUC" . "Decisive ONUC victory" . "Operation Grandslam" . "military action" . . "* Beginning ofKatanga insurgency" . . . "Congo-L\u00E9opoldville" . . "2 reconnaissance aircraft" . "10 fighter aircraft" . . . "There were no reports of civilian deaths confirmed by the UN during the operation, but statistics are ultimately unknown." . .