Mezue ahịrịokwu na-esonụ: Prussia hapụrụ Njikọ nke Mbụ na Udo nke Basel (1795), na-enyefe ókèala Rhenish na France. Mgbe Frederick William nke Abụọ nwụsịrị na 1797, ala ahụ dara ogbenye, ndị agha ya emewokwa ochie. Ọ bụ nwa ya nwoke, Frederick William nke Atọ (1797<unk>1840) nọchiri ya, onye tinyere Prussia n'ọgba aghara dị egwu
Òtù nke Anọ. E meriri ndị agha Prussia n'agha nke Saalfeld, Jena na Auerstedt na 1806 ma Napoleon weghaara Berlin. Ịdọ aka ná ntị a ma ama nke ndị Prussia dara ma mee ka ndị agha ukwu, ndị na-agba ịnyịnya na ndị agha ndị agha nyefee onwe ha. Ọ bụ ezie na ụfọdụ ndị ọchịagha Prussia mere nke ọma, dị ka L'Estocq na Eylau, Gneisenau na Kolberg, na Blücher na Lübeck, ha ezughị iji gbanwee mmeri nke Jena-Auerstedt. Prussia nwetara nnukwu mfu ókèala, ndị agha na-adịgide adịgide nke nanị ndị ikom 42,000, na njikọ aka na France na Treaty of Tilsit (1807).