Months before Russia invaded Ukraine in 2022, Erik Prince suggested to the White House that they give A10s, F-15s, F-16s and other aircraft that were being retired to Ukraine. He believed that Ukraine having a superior Air Force would have prevented Russia from invading.

https://youtu.be/lF2fpyvWHvQ?si=FnLHU1nxIxwnXtLu&t=235