This was because we reached an agreement between the Department of Defense and the governors of each state in the United States for how these military forces would operate more effectively together and give governors a say over the disaster response priorities that these military forces would be carrying out. That was a breakthrough in governance in the United States and allowed for much more efficient targeting of defence resources to support civil authorities than was possible in hurricane Katrina.
On May 6th, 2014. See this statement in context.