On NUMBER@1 May NUMBER@2 , the ORGANIZATION@1 's new Chief of Staff PERSON@1 -LRB- PERSON@2 had been killed -RRB- called a ceasefire and ordered volunteers to `` dump arms '' .

When the ORGANIZATION@1 's new Chief of Staff called a ceasefire PERSON@1 on NUMBER@1 May NUMBER@2 the government had won .
