Convention of Tauroggen

[1] Yorck's act is traditionally considered a turning point of Prussian history, triggering an insurgency against Napoleon in the Rheinbund.

This resulted in some Prussians leaving their army to avoid serving the French, among them Carl von Clausewitz, who joined Russian service.

He had to judge whether the moment was favorable for starting a war of liberation; and, whatever might be the enthusiasm of his junior staff-officers, Yorck had no illusions as to the safety of his own head, and negotiated with Clausewitz.

[2] The news was received with the wildest enthusiasm in Prussia, but the Prussian court dared not yet throw off the mask, and an order was dispatched suspending Yorck from his command pending a court-martial.

Diebitsch refused to let the bearer pass through his lines, and the general was finally absolved when the Treaty of Kalisz definitely ranged Prussia on the side of the Allies.