O
Obedience [1524]
Object of military training [150]
OBJECTIVE—
Announced before or after range[181]
Once designated not changed unless ordered[182]
Oblique deployment as skirmishers [245]
Oblique march [162]–163
Observation [200]–201
Observation of target and fire [428]–429
OBSTACLES:
Abatis[1176]
Against cavalry[1180]
Automatic alarms[1192]
Barricades[1185]
Cheveaux de frise[1179]; [1189]
Fraise[1178]
Guarding obstacles[1190]
In front of outguards[1187]
Inundations[1186]
Kinds[1176]
Lessons from European War[1188]
Listening posts[1191]
Location[1175]
Military pits[1184]
Necessity for[1174]
Object[1173]
Palisade[1177]
Search lights[1193]
Trous de loup[1184]
Wire entanglements[1181]; [1182]; [1188]
Wire fence[1183]
Obstacles located by Major [358]
Occupation of ground [1426]
Offensive necessary for decisive results [367]
Office, how to enter [1527]
Officer of the Day [1593]
OFFICERS:
Posts of[71]
To be true leaders[377]
To comply with spirit of orders[377]
Oil, use on rifle [1330]; [1339]
ON RIGHT (LEFT) INTO LINE:
Battalion[313]
Company[230]
Open packs [648]
Open ranks [646]
Open sight [1352 (a)]
Opening fire on defense [360]
ORDER:
Assumed in resuming attention from rest or at ease[121 (fifth)]
Piece brought to, upon halting[121 (seventh)]
Piece striking ground gently[122 (third)]
Position in next to last motion[122 (third)]
Position of piece at[123]
Order and cohesion in combat [376]
Order, close, definition [43]
Order, extended, definition [44]
ORDER FROM:
Inspection[146]
Left shoulder[136]
Port[128]
Present[128]
Right shoulder[130]
Trail[140]
ORDERLIES:
Carrying signal flags[400]
Do not change position when commander faces about to give command[74]
Posts of[73]; [78]
ORDERS:
Battle[392]
Brigade and division, usually written[392]
Compliance with spirit of[377]
Composition of combat order[395]
Definition[85]
Deployment[392]
Deviation from[388]
Encroaching upon functions of subordinates, prohibited[396]
Given subordinates through immediate superiors[397]
Reconnaissance to precede issuing of initial combat orders[394]
Regiment, usually verbal[393]
Repetition of[83]
To be definite[396]
Use in battalion combat[328]
Verbal[393]
When used[80]; [85]
Orders, files of, company [891]
Orders for sentinels [1716]
Orders, tactical preparation [952]
Organization, military [1858]
Orientation [1872]
Outlined enemy [56]; [273]; [370]; [371]
Outpost, establishing by company [1080]
Outpost sketching [1890]
Outposts at night [1103]
Overhead cover, trenches [1154]