Class U: Military Science is a classification used by the Library of Congress Classification system. This page outlines the sub-classes of Class U.^{[1] [2]}

21‑22.3.....................................War. Philosophy. Military sociology

27‑43........................................History of military science

45.............................................Historiography

56‑59........................................Army clubs

150‑155.....................................Military planning

161‑163.....................................Strategy

164‑167.5..................................Tactics

168...........................................Logistics

250‑255.....................................Maneuvers (combined arms)

260...........................................Joint operations. Combined operations

261...........................................Amphibious warfare

262...........................................Commando tactics

263‑264.5..................................Atomic warfare. Atomic weapons

300‑305.....................................Artillery and rifle ranges

310‑310.2..................................War games

320‑325.....................................Physical training of soldiers

400‑714.....................................Military education and training

750‑773.....................................Military life, manners and customs, antiquities, etc.

799‑897.....................................History of arms and armor

21‑885.....................................By region or country

910‑915...................................Mobilization

920‑925...................................Plans for attack and defense

926‑929...................................Civil defense

929.5‑929.95...........................War damage in industry. Industrial defense

940‑945...................................Military communication

950‑979...................................Routes of travel. Distances

985‑997...................................Military geography

160‑165...................................Records, returns, muster rolls, etc.

170‑175...................................Adjutant generals' offices

180‑197...................................Civilian personnel departments

250‑271...................................Intelligence

273‑274...................................Sabotage

275‑277...................................Psychological warfare. Propaganda

320‑338...................................Enlistment, recruiting, etc.

340‑345...................................Compulsory service. Conscription and exemption

356‑369.5................................Provision for veterans

370‑375...................................Military pensions, etc.

380‑385...................................Soldiers' and sailors' homes

407‑409...................................Warrant officers. Noncommissioned officers

410‑415...................................Officers

416‑419...................................Minorities, women, etc. in armed forces

420‑425...................................Furloughs

440‑449.5................................Retired military personnel

20‑258.....................................Organization of the service. By region or country

260‑267...................................Supplies and stores

270‑360...................................Transportation

400‑440...................................Barracks. Quarters. Camps

460‑535...................................Clothing and equipment

540‑585...................................Equipage. Field kits

600‑695...................................Horses. Mules. Remount service

700‑780...................................Subsistence

157‑302...................................Tactics. Maneuvers. Drill regulations

320‑325...................................Manual of arms

330‑335...................................Firing. Military sharpshooting

340‑345...................................Bayonet drill

380‑425...................................Small arms. Swords, etc.

450‑455...................................Mounted infantry

460‑464...................................Mountain troops

470‑475...................................Ski troops

480‑485...................................Airborne troops. Parachute troops

490‑495...................................Airmobile operations

144‑145...................................Horse cavalry

147..........................................Armored cavalry

157‑302...................................Tactics. Maneuvers. Drill regulations

420‑425...................................Cavalry sword exercises

460‑475...................................Horses

157‑302...................................Tactics. Maneuvers. Drill regulations

400‑405...................................Field artillery

450‑455...................................Seacoast artillery

460‑465...................................Siege artillery

470‑475...................................Howitzer artillery. Mortar batteries

480‑485...................................Garrison artillery

500‑515...................................Weapons systems

520‑537...................................Ordnance and small arms

540‑545...................................Arsenals, magazines, armories, etc.

560‑780...................................Ordnance material (Ordnance proper)

820‑830...................................Ballistics. Velocities and motions of projectiles

848‑856...................................Artillery instruments. Fire control, etc.

1‑620................................Military engineering

160‑302..................................Tactics and regulations

335.........................................Bridges

340.........................................Tunnels

360‑390..................................Field engineering

400‑442..................................Fortification

443‑449..................................Attack and defense. Siege warfare

470‑474.................................Military surveying, topography, and..mapping

490.........................................Land mines, etc.

500‑565..................................Technical troops and other special corps

570‑582..................................Military signaling

590‑613.5...............................Military telegraphy and telephony

614‑614.5...............................Military electric lighting

615‑620..................................Military motor vehicles

622‑1435...........................Air forces. Air warfare

633‑635..................................By region or country

637‑639..................................Education and training

640‑645..................................Military aeronautical research

700‑705..................................Tactics

730‑735..................................Air defenses

760‑765..................................Aerial reconnaissance

770‑1045................................Organization. Personnel management

1097.......................................Air bases

1100‑1435...............................Equipment and supplies

1500‑1530.........................Military astronautics. Space warfare. Space surveillance

1523‑1525...............................By region or country

20‑25......................................Chaplains

201‑515...................................Medical and sanitary services

520‑(560)................................Care of sick and wounded. Relief societies

600‑629.5................................Military hygiene and sanitation

700‑705...................................Public relations. Press. War correspondents

750‑769...................................Military social work. Social welfare services

800‑910...................................Recreation and information services