In a sweeping rebuke of President Trump’s behavior in office, former Defense Secretary James Mattis on Wednesday condemned Trump’s deployment of the military in Washington, DC’s Lafayette Square to disperse peaceful protesters with tear gas for a photo op, the Atlantic reports. Mattis, who resigned in 2018 over President Trump’s decision to withdraw troops from Syria, called the turmoil of the past week “the consequences of three years without mature leadership.” “When I joined the military, some 50 years ago, I swore an oath to support and defend the Constitution,” he wrote.