(This is just a sample set and is not all inclusive.)
U1-U187 - Military Science (Branson)
U1-U149 - General. History
U150-U160 - Military Planning
U161-U399 - Strategy. Tactics. Operations
U400-U718 - Military education and training
U719-U749 - Military observations on special wars. [Defunt. Look in LC Classifications D,E, & F]
U750-U798 - Military life
U799-U897 - History of arms and armor
UG1 - UG 1530 - Military Engineering. Air Forces
UG1 - UG159 - General. History
UG160- UG329 Tactics. Maneuvers
UG330 - UG469 Engineering. Fortifications. Attack and defense.
UG470 - UG499 Surveying. Topography. Mapping
UG500 - UG569 Technical Troops
UG570 - UG621 Signaling. Communications.
UG622 - UG1530 Air Forces