The Department of War has killed 221 people in 66 strikes since September, a Southern Command official said. "U.S. Southern Command uses internal metrics to assess Operation Southern Spear, but specific details are not released for security reasons," a Southern Command spokesperson told The Center Square. In March, Gen. Francis Donovan, the head of U.S. Southern Command, testified before the Senate Armed Services Committee. Donovan said he could not provide measures of effectiveness of Operation Southern Spear but pointed to changes in traffickers' patterns. Kenney said the Government Accountability Office has not been asked to review Operation Southern Spear.