This is a tale about politics, influence, money and murder. It began more than 40 years ago with a bloodletting so massive that no one quite knows how many people died. Half a million? A million? Through four decades, the story of the relationship between the United States and the Indonesian military has left a trail of misery and terror. Last month it claimed four peasants, one of them a 27-year-old mother. Unless Congress puts the brakes on the Bush administration’s plans to increase aid and training for the Indonesian army, there will be innumerable victims in the future as well.