FROM: High Command
TO: Arma 3 Users
UNIT: Main Branch (Windows)
ACTIVITY: Game Update 1.66 (Footsteps Audio Overhaul, Tactical Ping, Maintenance)
SIZE: ~10 GB / ~1.6 GB (depends on Apex ownership)
More in the full changelog and SPOTREP
SPOTREP #00062
Source: Steam Community (opens in a new tab)