Washington: A senior American general who served as a combat commander in Iraq has accused the Defence Secretary, Donald Rumsfeld, of squandering the lives of United States soldiers by ignoring military advice on how to conduct the campaign. In an interview with The Sunday Telegraph, Major General John Batiste, who resigned last year after 12 months stationed in Iraq's Sunni Triangle, said the Pentagon chief had caused "unnecessary deaths" by committing "strategic blunders of enormous magnitude".