For all NAK Tac events a collection of mods are required - NAK Tac Basic collection
Or if you would prefer these are the links to each mod on Steam.
CUP ACE3 Compatibility Addon - Vehicles
CUP ACE3 Compatibility Addon - Weapons
CUP Terrains - Core
CUP Terrains - CWA
CUP Terrains - Maps
CUP Units
CUP Vehicles
CUP Weapons
Specialist Military Arms (SMA) Version 2.7.1
VSM All-In-One Collection

Along with these mods - Enhanced Movement and C-Tab (For Team Leaders only) will also be allowed, but not required.