Please note these only generate on vanilla planets and biomes, if you want to spawn them on other worlds for any reason use the commands below.

V V Large Generated Structures. V V
--Military Training Camp-- (A Emplacement military training base to train troops.)
/placedungeon UCDFMilitaryBase
--Highway Convoy-- (A highway packed with military vehicles and supplies.)
/placedungeon UCDFHighwayConvoy
--Occupied City-- (A human town protected by UCDF and UIR forces.)
/placedungeon UCDFOccupiedCity

--Contested City-- (A human town partly overrun with pockets of cultists.)
/placedungeon UCDFContestedCity
--Wartorn City-- (A human town overrun completely by cultists.)
/placedungeon UCDFWarTornCity
--Outbreak City-- (A human town overrun with infected. Bring a flamethrower.)
/placedungeon UCDFInfectedCity

V V Small Generated Structures. V V
/placedungeon UCDFForestMixedMicrodungeons
/placedungeon UCDFDesertMixedMicrodungeons
/placedungeon UCDFSnowyMixedMicrodungeons
/placedungeon UCDFSwampMixedMicrodungeons
/placedungeon UCDFSavannahMixedMicrodungeons
/placedungeon UCDFToxicMixedMicrodungeons
/placedungeon UCDFMidnightMixedMicrodungeons
/placedungeon UCDFScorchedMixedMicrodungeons
/placedungeon UCDFOutbreakMixedMicrodungeons

If you are looking for specific small generated structures just ask and Ill post them.