The Salmon War (German: Lachsfangstreit) of 1736/37 was a political conflict between the confederate Canton of Basle and the Kingdom of France over fishing rights and the location of their state border in the River Rhine.
In 1735 and 1736, at the start of the salmon season, there were again insults thrown and mass struggles between the fishermen of Neudorf, Hüningen and Kleinhüningen.
The conflict became a state-level issue through the news that the Obervogt of Kleinhüningen, Jakob Christoph Frey, an official of the Basle Estate, had been involved in the violence of 1736 and organized it out of his own interest.
A request for support from Basle to the Swiss states failed due to confessional and political antagonism and the influence of the French Ambassador in Solothurn.
The French officials sharply rejected Basle's delegations in Strasbourg and Solothurn and its letters of justification to Paris.