Detachment-A detachment is a unit half the size of a normal unit rounded to the nearest whole number(for example, you make a detachment out of a unit of 30 goblins, that unit is only 15 goblins now. However, if you make a detachment out of a unit of 15 duelists, then the detachment is 8 models). The cost of the unit is half of its original value, rounded up to the next multiple of five(Going back to the unit of goblins, it normally costs 60points, so you'd half that to 30points and then round it up to 35points, for the duelists, they normally cost 105 points, so you'd half it to 52.5points, then round it up to 55points. If the unit cost 70 points originally then you half that to 35points then round to 40points) Please note the following restrictions on detachments:
The cost of all upgrades(with the exception of champions, banners, and war horns) is cut in half and round up to the nearest whole number(if the upgrade was 15pts, it is now 8 points).
You may not make a detachment of of a detachment or regiment.
you may not have detachments of any unit with less then 10 infantry, or cavalry models.
You may not make a detachment out of a unit with less then 6 monsters.
you may not make a detachment out of ships, chariots. or war machines.
Regiments-A regiment is a unit that is double the size of a normal unit(for example, doubling a unit of 20 troopers to 40 troopers, or 10 Scarecrow Warriors to 20 Scarecrow Warriors)the cost of the unit is double what it was, rounding down to the nearest multiple of 10(going back to the Troopers, their normal cost is 100 points but you double that to 200 points, and then round down to 190points. The Scarecrow Warriors, were 120points, but you double that to 240points and the round down to 230points). Please note the following restrictions on regiments:
The cost of all upgrades(with the exception of champions, banners, and war horns)is double what it was(if it was 20 points, it is now 40points).
You may not make a regiment out of a regiment or detachment.
you may not make a regiment out of any model with the loner or unique special rule.
You may not put a regiment in any unit with the transport spc. rule(with the exception of terrain).