Fought July 15, 1857, between the British relieving force under Havelock and the mutineers who were opposing their advance on Cawnpore. The rebels were defeated and driven from their entrenchments.

Aquae Sextiae (Cimbric War).

Fought B.C. 102, when the Teutones under the king Teutobod, were totally routed by the Romans under Marius.

Aquidaban (Paraguayan War).

The last stand of the Paraguayans against the allied armies of the Argentine Republic, Brazil, and Uruguay, May 1, 1870. Lopez, with a small force of Paraguayans and 5,000 Indians, met the attack of the allies under General Camera on the banks of the Aquidaban, and after a sanguinary engagement, in which he and the Vice-President Sanchez fell, his army was cut to pieces, and the war ended. During the war the population of Paraguay was reduced from 1,500,000 to 221,000, of whom only 29,000 were males over fifteen years of age.

Aquileia (Eugenius' Usurpation).

Fought September 6 and 7, 394, between Theodosius, Emperor of the East, and Eugenius, the usurping Emperor of the West, whose army was commanded by Arbogastes. The first day's fighting went against Theodosius, who was only saved by darkness from a severe reverse, but during the night a force sent by Arbogastes to secure the passes in Theodosius' rear, deserted to his standard, and thus reinforced and aided by a dust storm which blew in the faces of his antagonists and disordered their ranks, he on the following day gained a signal victory.

Aras (First Mahratta War).

Fought May 18, 1775, between Raghunath Rao, the claimant to the Peshwaship, with 20,000 Mahrattas, and 2,500 British troops under Colonel Keating, and the army of the Mahratta chieftains, 25,000 strong under Hari Pant Phunhay. Raghunath's undisciplined levies fled, and threw the British line into confusion; but they rallied, and after hard fighting repulsed the Mahrattas with heavy loss. The British lost 222, including 11 officers.

Arausio (Fourth Gallic Invasion).