Development of the F-35 Joint Strike Fighter was shared by the United States (for the U.S. Air Force, Navy, and Marine Corps), Australia, Canada, Denmark, Italy, the Netherlands, Norway, Turkey, and the United Kingdom. In 2012, these countries agreed to manage F-35 sustainment assets as a global pool. This report reviews other international military aircraft spares pooling programs from the 1950s to the present to identify lessons learned.