This would have happened in no other country or army.

This was the true equality, so different from the exaggerated democracy of France,--an equality not of privilege but of obligation; every Pomeranian peasant who sent his son to fight and die in France knew that the sons of the most powerful man in the country and in Europe were fighting with them not as officers but as comrades.

Bismarck was more fortunate than his friends in that neither of his sons--nor any of his near relatives--lost his life; Roon's second son fell at Sedan, and the bloody days of Mars-la-Tour and Gravelotte placed in mourning nearly every noble family in Prussia.
From Gravelotte to Sedan he accompanied the army, and he was by the King's side on that fatal day when the white flag was hoisted on the citadel of Sedan, and the French general came out of the town with the message that Napoleon, having in vain sought death at the head of his troops, placed his sword in the hands of the King of Prussia.
The surrender of Sedan was a military event, and the conditions had to be arranged between Moltke and Wimpffen, who had succeeded MacMahon in command, but Bismarck was present at the conference, which was held in his quarters, in case political questions arose.

As they rode down together to Doncheroy he and Moltke had agreed that no terms could be offered except the unconditional surrender of the whole army, the officers alone being allowed to retain their swords.

Against these conditions Wimpffen and his companions struggled long, but in vain.
Moltke coldly assured them that they could not escape, and that it would be madness to begin the fight again; they were surrounded; if the surrender were not complete by four o'clock the next morning the bombardment of the town would begin.