01: Composition - 14aag/mission_template GitHub Wiki
Since the unit structure would be a pain to layout each time, there is a custom composition available to mission makers. You can find the composition files in the releases attached as a binary 14AAG_Full_Unit.zip
To load this into you editor, go to the arma 3 profile location you are using and in the compositions folder extract the zip so that it looks like so:
C:\Users\%USERPROFILE%\Documents\Arma 3 - Other Profiles\SGT%20B%2e%20Wayne\compositions\14AAG_Full_Unit\...
Obviously the SGT%20B%2e%20Wayne
would actually just be your profile.
Reload the editor if it's already open, and the composition should be available under unit compositions > custom