https://theintercept.com/2016/07/13/training/

And see, e.g.,

Weapons Given to Iraq Are Missing

By Glenn Kessler
Washington Post Staff Writer
Monday, August 6, 2007

http://www.washingtonpost.com/wp-dyn/content/article/2007/08/05/AR2007080501299.html

And see:

Stabilizing Iraq:
DOD Cannot Ensure That U.S.-Funded Equipment Has Reached Iraqi Security Forces

GAO-07-711, Published: Jul 31, 2007. Publicly Released: Jul 31, 2007.

http://www.gao.gov/products/GAO-07-711

But see:

https://www.fas.org/sgp/crs/row/R43361.pdf