Deja vu all over again.
In 1973, we pulled our soldiers out of South Vietnam after training local troops for a dozen years. Two years later, North Vietnam attacked, and the South Vietnamese soldiers threw away their guns and fled because they were not motivated to lay down their lives for the corrupt Saigon government.
In effect, the same has happened in Iraq, with the al-Maliki government failing to create any sense of loyalty to the nation.
Fortunately for us, the Vietnamese aftermath was resolved very quickly. Not so in Iraq, as it is a post-colonial country, created by the British, that never should have been a country due to the divisions within it. It is now breaking apart, and what will be the political outcome in five or 10 years, nobody knows.