■ Main objectives
(required for this achievement)
• Optional objectives (only required for full synch achievement)
Leave Boston through the south gate to the Frontier. Ride your horse to the next marker where you'll meet up with Charles Lee.
Memory 1 - Unconvinced
Memory 2 - Execution is Everything
Memory 3 - The Braddock Expedition
Go to next marker back at the Green Dragon in Boston.
Cutscene then achievement.
If you need videos, check out