It took place on 3 July 1866, near the Bohemian city of Hradec Králové (German: Königgrätz) and village of Sadová, now in the Czech Republic.
By 29 June, Prince Friedrich Karl had reached Jitschin and inflicted a severe defeat on the Austrian I Corps under General Clam-Gallas.
Dismayed by his losses, Benedek had ordered a withdrawal and urgently requested that Emperor Franz Josef make peace as the only way to save the army from a "catastrophe".
[18] When this was refused, and an ambiguous last sentence of the imperial telegram was interpreted as ordering a final stand, Benedek drew his Austrians up against the Elbe between Sadowa and Königgrätz.
The Crown Prince's Chief of Staff, Leonhard von Blumenthal, an able logistician, immediately reorganised Second Army's route plan.
The Austrian infantry was partially fortified and supported by cavalry in the rear and artillery units with firing range across hilly, wooded terrain.
The Saxons on the Austrian left fell back in good order, and proceeded to rain down fire on the advancing Prussian right from higher ground.
Reserve units were deployed at noon, but the outcome of the battle was still uncertain and Prussian commanders anxiously waited for the crown prince.
Their weapons had longer range, which meant that the outnumbered Prussians could neither advance against the artillery barrage, nor effectively engage the Austrian infantry.
The Prussian center, in the cover of the forest, was able to hold its position, and discourage a mounted charge by the Austrians, who were thought to have superior cavalry.
In addition the needle gun could be operated while prone in defense, and while moving quickly on the advance, while the Austrians had to stand up after each shot to reload their Lorenz rifles.
While divisions from the Austrian II and IV Corps were committed to the fighting, there was no decisive infantry charge, nor did the Prussians present a flank that could be attacked with cavalry.
Around 12:30 two rifled batteries of 2nd Division arrived, and around 13:00, Oberst von Bülow, part of Army of the Elbe, brought the corps artillery, two regiments, to the battlefield.
At this point, having taken severe casualties, lacking artillery and cavalry cover, the high ground in enemy hands and the center being rolled up, the position for the Austrians deteriorated rapidly.
The Prussian king ordered all remaining forces into the attack all along the line, which had been slowed by the final counter-attack from the battalions of Brigadier General Ferdinand Rosenzweig von Dreuwehr's Austrian brigade.
In his speech to the Reichstag on 2 May 1871, Chancellor Otto von Bismarck stated: It is known that even on 6 August 1866, I was in the position to observe the French ambassador make his appearance to see me in order, to put it succinctly, to present an ultimatum: to relinquish Mainz, or to expect an immediate declaration of war.
The French public resented the Prussian victory and demanded "Revanche pour Sadova" or "Revenge for Sadowa",[22] which formed part of the background to the Franco-Prussian War of 1870.
Arriving several days later with a large stock of supplies, Saxon nurse Marie Simon tended to the wounded for 17 weeks.
This experience led her and Carola of Vasa to establish the Albert Association [de], a precursor to the German Red Cross.
The memorials were erected with funds from the families of the fallen, regiments, officers, the Order of St. John, and especially the Central Committee for the Preservation of Monuments from the War of 1866.