Vice President Joe Biden once triumphantly declared that Iraq would one day be seen as the Obama administration’s “greatest achievement.” This was back when the plan was to bring all American troops homes. There was some talk of leaving a residual force of 10,000 or so, but this plan was never enthusiastically pursued and eventually dropped for, among other reasons, the inability to negotiate a status-of-forces agreement with the Iraqi government. Eventually, U.S. troops were gone from Iraq.