Here is the full list of all 51 Vietnam ‘65 achievements.
Accumulate rank points
Win a game
End the game with at least 4 active Hueys, 1 Chinook and 1 Cobra (Veteran)
Achieve a decisive victory. (Veteran)
Finish a game with at least 3 active forward bases.
Achieve 5 kills in one game using Green Berets.
Improve H&M score for 6 turns in a row.
Kill 25 NVA.
Achieve 5 consecutive kills of VC units using US infantry.
Achieve 5 consecutive kills of NVA units using US infantry.
Achieve 4 consecutive successful air strikes with a Cobra.
Achieve 3 consecutive kills with infantry.
Win a game after allowing H&M to drop below 40 (Veteran)
Lose a game after having an H&M higher than 60
Achieve 2 consecutive decisive victories.
Kill over 100 enemies in a game.
Kill over 50 enemies from a single enemy faction.
Achieve 6 consecutive successful air strikes.
Lose more than two transport helicopters in one game.
Win 10 Veteran games
Achieve 5 kills with ARVN infantry in one game.
Achieve 5 victories
Maximise the H&M of two villages.
Win 3 games.
Kill 75 NVA.
Kill 150 NVA.
Kill 300 NVA.
Acquire all Marksman badges,
Acquire all Sharpshooter badges.
Acquire all Expert badges.
Clear 30 mines.
Heal 50 US infantry units at the HQ.
Achieve 10 consecutive kills.
Achieve 3 consecutive kills using ARVN infantry.
Play 3 games.
Play 8 games.
Play 13 games.
Play 18 games.
Play 23 games.
Play 28 games.
End a game with 6 or more active ARVN units.
End a game with at least 6 active infantry, 2 mechanized infantry, 2 artillery, 1 armor and 1 cobra unit.