Battle of Koniggratz.

The Battle of Königgrätz, also known as the Battle of Sadowa, or Hradec Králové, was the decisive battle of the Austro-Prussian War, in which the Kingdom of Prussia defeated the Austrian Empire. Taking place near Königgrätz (Hradec Králové) and Sadowa (Sadová) in Bohemia on 3 July 1866, it was an example of battlefield concentration, a convergence of multiple units at the same location to trap and/or destroy an enemy force between them.

There were more troops on the field of Königgrätz than any other battle, prior to, or after it until the battle of Mukden (20th February-10th March 1905). Even the greatest battle of the century thus far, Leipzig in 1813, also known as the Battle of Nations, in which, on the final day of the battle the troops on both sides numbered, after losses sustained during the previous days fighting, some 420,000 men engaged, still fell short of the 430,000 plus who stood on the field of Königgrätz.
Including 55 figures and detailed maps.