WASHINGTON DC (The Hill): The U.S. withdrawal from Afghanistan is over, but congressional oversight has just barely begun.

Lawmakers continue to have lingering questions about a withdrawal that saw the deaths of 13 U.S. troops, as well as scores of Afghans, and are promising hearings and probes in the coming weeks.

Already one House committee has moved to try to compel answers, advancing a defense policy bill this past week that would require reports on everything from the decision to leave Bagram Air Base to what military equipment was left behind.

Here are five questions about the withdrawal lawmakers want answered.