The Expeditionary Combat Support System (ECSS) was a failed enterprise resource planning software project undertaken by the United States Air Force (USAF) between 2005 and 2012. The goal of the project was to automate and streamline the USAF's logistics operations by, in part, consolidating and replacing over 200 separate legacy systems. Development of the system was originally contracted to the Oracle Corporation in 2005, and was later supervised by Computer Sciences Corporation.