After the extinction of her line in 1707 , Le Landeron submitted to Frederick I , King of Prussia after he threatened military force .
The town remained loyal to Marie , the Duchess of Nemours during her conflicts with her step - daughter over the inheritance .
After the extinction of Marie 's line in 1707 , Le Landeron submitted to Frederick I , King of Prussia after he threatened military force .
The town remained loyal to Marie , the Duchess of Nemours during her conflicts with her step - daughter over the inheritance .