The exact contents of a Force Pack varies by faction and sub-era, but every Force Pack is a fully playable ESR Force for a player to command.
Here’s an example of what is available in the Russian Mid-Late War Force Pack: Pehotniy Korpus available for Pre-Order today.
(Go here see what’s in a French Corps d’armée Force Pack.)
8
Ten figure Battalions of Yegerskiy (Jägers)
16
Ten figure Battalions of Pehotniy (Infantry)
4
Twelve figure 6-pdr Batteries of Legkaya Artilleriyskaya i Oboz (Light Artillery with Train)
2
Twelve figure 12-pdr Batteries of Batareynaya Artilleriyskaya i Oboz (Heavy Artillery with Train)
2
Two figure Engineer Companies of Pionery
3
Four figure Squadron Groups of Donskoy Kazachiy (Don Cossacks)
3
Assorted Reformation Areas that may include various wagons, caissons, field forges, and other Train and Equipage vehicles

1
Random historical Force Commander

3
Formation Stat Cards

6
Assorted Objective Markers (four objectives, two dummies)

6
Directive (4) and Status (2) Cubes

32
Flags

48
3mm Thick Laser Cut MDF Bases

1
Quick Reference Guide