In the campaign of 1799 he once more opposed Jourdan, whom he defeated in the battles of Ostrach and Stockach, following up his success by invading Switzerland and defeating Masséna in the First Battle of Zurich, after which he re-entered Germany and drove the French once more over the Rhine.
During the French Revolutionary Wars, the French army invaded Switzerland and turned it into an ally known as the "Helvetic Republic," (1798–1803).
Helvetic Republic (1798–1803), a constitutional arrangement of the Swiss cantons imposed by French military might
The office of Landvogt was abolished in 1798, with the foundation of the Helvetic Republic.
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The Raurici were related to the Helvetii, whose name was later bestowed on another French client state, the Helvetic Republic.
After the collapse of the Ancien Régime and during the period of Napoleon's Helvetic Republic, from 1798 to 1803, Yvonand was forced to join the Canton of Léman, which afterwards became Canton Vaud.
Commissioner Heinrich Zschokke re-established the authority of the Helvetic Republic on his arrival; a new préfet was appointed, Giuseppe Giovanni Battista Franzoni.
Under the Helvetic Republic, Orbe became the capital of the District of Orbe.