Page "Aargau" Paragraph 20

French forces occupied Aargau from 10 March to 18 April 1798 ; thereafter the Bernese portion became the canton of Aargau in the Helvetic Republic and the remainder formed the Canton of Baden.

In 1803, the two halves were united under the name of canton of Aargau, which was then admitted as a full member of the reconstituted Confederation.

Fricktal, ceded in 1802 by Austria via Napoleonic France to the Helvetic Republic, was briefly a separate Swiss canton under a Statthalter (' Lieutenant '), but on 9 March 1803 was incorporated in the canton of Aargau.