sentences:  Khánh swiftly attempted to cement his grip on power by announcing himself as the new head of state and as Chairman of the Military Revolutionary Council in place of Minh.Khánh had tried to convince Minh to stay on as a powerless head of state, and a standoff developed on the day of the coup before Khánh concluded that Minh would refuse to serve.Minh was taken to military headquarters, and after refusing for several hours to cooperate, was taken under armed guard to his home for lunch.