Help Section - March To Rome
How to hide troops?
Anytime you wish to save a few troops from trouble, so they still have their heads attached when you come back - go to the dungeon or the army interface and enter the dungeons menu:
You can also use the combined menu button on the left side of the resources HUD. This is the quickest way to access send resouce, move, hide army and the military patrol menus.
Hide Army Menu
Select what type and number of troops you want to hide and they will be safe from any battle until you mobilize them again.
Even though they cower in tunnels you still pay upkeep for them...