Rastadt (Wars of the French Revolution).
Fought 1796, between the French, under Moreau, and the Austrians, under the Archduke Charles. After a severe engagement Moreau succeeded in seizing the heights held by the Austrians, and forced Charles to retreat to the Danube.
Raszyn (Campaign of Wagram).
Fought April 19, 1809, between 30,000 Austrians, under the Archduke Ferdinand, and about 20,000 French and Poles, under Poniatowski. The Archduke was marching on Warsaw when Poniatowski, to whom the defence of that city had been entrusted, came out to meet him, and after a stubborn fight in the woods and marshes round Raszyn, was driven back upon Warsaw, with a loss of 2,000 killed and wounded. A few days later he surrendered the city to the Austrians to save it from a bombardment.
Rathenow (Swedish Invasion of Brandenburg).
Fought June 25, 1675, between the Brandenburgers, 15,000 strong, under the Elector Frederick William, and the Swedes, under Charles XI. The Swedes, wearied by a long march, were surprised by the Elector in their camp, and suffered a serious reverse.
Rathmines (Civil War).
Fought August 2, 1649, between the Royalists, under Ormonde, and the Parliamentary garrison of Dublin, under Colonel Jones. Ormonde having ordered a night attack upon Dublin, the Parliamentarians made a sortie, and driving back the assaulting column, attacked the main body of the Royalists in their camp, totally routing them, with a loss of 4,000 killed and wounded and 2,000 prisoners. All Ormonde's artillery was captured.
Ravenna.
Fought 729 between the troops of Leo the Iconoclast, and a force of Italians, raised by Pope Gregory II, in defence of image worship. After a severe struggle, the Greeks were routed, and in their flight to their ships were slaughtered by thousands. It is said that the waters of the Po were so infected with blood, that for six years the inhabitants of Ravenna would not eat any fish caught in that river.