FM 90-3 of water, heat, and wind to give deserts their characteristic barren appearance. The bedrock may be covered by a flat layer of sand, or gravel, or may have been exposed by erosion. Other common features are sand dunes, escarpments, wadis, and depressions. This environment can profoundly affect military operations. See Figure 1-2 for locations of major deserts of the world, and Appendix A for additional information on desert countries of the world. It is important to realize that deserts are affected by seasons. Those in the Southern Hemisphere have summer between 21 December and 21 March. This 6-month difference from the United States is important when considering equipping and training nonacclimatized soldiers/marines for desert operations south of the equator. TERRAIN Key terrain in the desert is largely dependent on the restrictions to movement that are present.
DesignationFM 90-3
EditionJan 1993
StatusSuperseded
Pages221
FunctionFieldcraft Survival
CollectionRecent Archive