Defense Logistics Agreements: DOD Should Improve Oversight and Seek Payment from Foreign Partners for Thousands of Orders it Identifies as Overdue, Report to Congressional Committees [open pdf - 3MB]
From the Highlights: "According to DOD, from fiscal years 2014 through 2019, it used ACSAs [acquisition and cross-servicing agreements] to provide billions of dollars of logistic support, supplies, and services to more than 100 partner countries. For example, this support included fuel and ammunition to assist international exercises and coalition operations, among other efforts. Senate Report 115-262 included a provision for GAO [Government Accountability Office] to review ACSA management. This report examines the extent to which (1) agencies have provided information to Congress about ACSAs, and (2) DOD has tracked and received reimbursement for ACSA orders."
Government Accountability Office: https://www.gao.gov/