A copy of the US Navy’s 1975 guide to “Christening, Launching, and Commissioning” ships uncovered in the Central Intelligence Agency’s archives offers a fascinating history of the surprisingly rich tradition of ruining a perfectly good bottle of champagne.

The “friendly” rivalry between America’s East and West Coasts extends from hip-hop feuds to pizza bagels, and recently unearthed memos regarding California champagne from the CIA’s declassified archive shows that even the Agency isn’t immune.