Oodeypoor, or Mewar. A Rajpoot state in India. It became tributary to the British government by the treaty of 1818. A corps of Bheels was raised in 1841 at the joint expense of the British and Oodeypoor governments, in order to reduce to subjection the Bheel districts of the country.
Oojein, or Oojain. A city of India, in the territory of Gwalior, 152 miles southwest from Goonah. It fell into the power of the Mohammedans in 1310. At this time it was the capital of Malwa; and along with this country it afterwards came under the power of the Patans, but was recovered by Akbar in 1561. In the middle of the 18th century it was conquered by the Mahrattas.
Opatas, or Yakis. An Indian people who reside in the state of Sonora, Mexico. They number about 25,000, and are generally peaceable and industrious.
Open. In military movements and dispositions, this term is frequently used in contradistinction to close; as, open column, open distance, open order, etc. It also constitutes part of a word of command; as, rear rank take open order. By open distance in column is meant that the intervals are always equal in depth to the extent in front of the different component parts of the column.
Open Flank. In fortification, is that part of the flank which is covered by the orillon.
Opening of Trenches. Is the first breaking of ground by the besiegers, in order to carry on their approaches towards the place.
Operations, Lines of. See [Lines of Operations].
Operations, Military. Consist in the resolute application of preconcerted measures in secrecy, dispatch, regular movements, occasional encampments, and desultory combats or pitched battles.
Opinion. In military proceedings that regard the interior government of an army, this word signifies decision, determination, judgment formed upon matters that have been laid before a court-martial or court of inquiry.
Opinion. Officers on courts-martial give their opinion by seniority, beginning with the youngest in rank.