Grasslands are vegetation dominated by grasses in environments conducive to grass growth. They lie between forests and deserts in the global climate gradient. Grasslands evolved during Cenozoic Era (65.5 million years ago to present). Some grasslands expanded only during ice ages in northern temperate regions
Bulk density is the mass of particles divided by total bulk volume. Bulk volume includes particle volume, voids, and internal pores. Bulk density is an extrinsic property that changes with handling. Powder bulk density can be reported as freely settled or tapped
Division design depends on terrain and combat width restrictions. Combat width limits number of divisions per battle. Exceeding terrain width results in heavy combat penalties
WRB evolved from FAO-UNESCO Soil Map of the World project in 1961. System was first published in 1998, translated into 15 languages. Fourth edition (2022) includes new definitions and field guide
Soil consists of solid particles, liquid (water) and gas phases. Water density at 4°C is 1.00 g/cm³. Unit weight (Y) is calculated using density (p) and standard gravity (g)
Combat width meta changed after Arms Against Tyranny, allowing multiple viable widths. Foot templates include garrisons, infantry, marines, mountaineers, and paratroopers. Mobile templates consist of motorized, armored, and amphibious units. Off-map templates available for resistance suppression with La Resistance DLC