Sentence:  But they <WSD>left</WSD> behind them large numbers of officers , variously called `` volunteers '' or `` mercenaries '' , who now staff the army of Moise Tshombe in Katanga , the seceded province which , according to Tshombe , holds 65 % of the mineral wealth of the entire country . 
Meaning of the word marked with <WSD> tags:  go and leave behind, either intentionally or by neglect or forgetfulness