ARVN, n. The acronym is for the Army of the Republic of (South) Vietnam.
From Life, May 8, 1964, page 39: “It’s a known fact over here that the ARVN (South Vietnamese army units) don’t receive many casualties. ... So the ARVN always leaves them a way free. This is fact, not rumor.”
folkie, n. The times they were a-changing, but ironically popular music was reaching back to revive folk tunes.
From Life, May 21, 1965, page 19: “There are folkies: single, paired and in mobs.” (It looks like this can be further antedated, but it’s too discouraging to try to deal with the metadata, which seems to be getting worse instead of better.)
Stolichnaya, n. The name of the Russian vodka appears in a 1966 Len Deighton spy novel. But Stolichnaya was trademarked and went on sale in the United States in 1969.
Perhaps of interest: the name (Столичная) is based on the word for ‘capital city’ (столица), and it was originally made (starting sometime during WWII) by the Moscow State Wine Warehouse №1.