Operation Eager Glacier was a secret U.S. effort to spy on Iran with aircraft in 1987 and 1988.[1] The information gathered became part of an intelligence exchange between U.S. military intelligence services and Iraq during the Iran–Iraq War.[2]
Eager Glacier took place at the same time as other U.S. military operations in the Persian Gulf, including Operation Earnest Will, the naval escort of Kuwaiti-owned tankers; Operation Prime Chance, the secret attempt to prevent Iranian forces from attacking Gulf shipping; and Operation Praying Mantis, the retaliation for the mining of the U.S. guided-missile frigate USS Samuel B. Roberts.