Corridor. The covered way lying round the whole compass of the fortifications of a place.

Corselet. A little cuirass, or piece of armor to cover the front of the body, worn formerly by pikemen.

Corsica. An island in the Mediterranean, held by the French. This island has been successively occupied by the Carthaginians, Romans, Goths, Saracens, Franks, the popes, and Genoese; and lastly by the French, in whose possession it now remains, and to whom it was ceded by the Genoese in 1768. This island was held by the British from June, 1794, to Oct. 22, 1796.

Cortege. The official staff, civil or military.

Corus, Corupedion, or Cyropedium. A plain in Phrygia, Asia Minor, where the aged Lysimachus was defeated by Seleucus, and slain, 281 B.C. These two were the only survivors of Alexander the Great’s generals.

Corygaum. An insignificant village in the presidency of Bombay; historically interesting in connection with the final subjugation of the Peishwa of the Mahrattas. On Jan. 1, 1818, it was defended for nine hours by a mere handful of men under Capt. Staunton, against a native force numbering at least 3000 infantry and about 20,000 cavalry, the struggle terminating in the repulse of the assailants after terrible slaughter.

Cossacks (Russ., Kasacks). A military organization of irregulars in the Russian service. They contribute much to the military strength of Russia; but several insurrections, of which the most alarming was that of 1773, have taken place since they became subjects to the Russian government.

Cossova. A plain in Servia. Here Amurath I. totally defeated the Christian army (Servians, Hungarians, etc.), September, 1389; but was himself killed by an expiring soldier. At this place, in 1448, John Huniades was defeated by a Turkish army four times larger than his own.

Costa Rica. The most southern state of Central America; bounded north by Nicaragua, northeast by the Caribbean Sea, south by New Granada, and south and west by the Pacific. The government of Costa Rica was established in 1832, and is accounted as the best and most liberal in Central America.

Coston’s Lights. Colored pyrotechnical compositions used for night signaling. Sometimes used in the form of a pistol cartridge.