In 1785, the duke lived in Aachen for a short time.
The patriots tried to get hold of his correspondence, using both intrigue and force.
 Throughout Europe, the nobility came under heavy criticism, and some of the Patriots (anticipating the fate of the nobility and its privileges) followed suit, making public all records relating to the duke so as to broadcast news of his fall right across the continent.
 The patriots were also energetic that year in organizing provincial armies and exercising free corps and exercitiegenootschappen (military societies) with democratically chosen officers, leading to the first democratically elected city government in the city Utrecht, but also to the occupation of Elburg and Hattem by the Stadtholderian troops in September 1786.

Louis Ernest stayed in Eisenach from 1786, where, with the help of August Ludwig von Schlözer, he wrote his Autobiography and its sequel, his Defence.
 Both works were soon translated from their original German into Dutch.
 He was in close contact with the court at Weimar, especially with his niece, Duchess Anna Amalia, and with Duke Charles August.
 Louis Ernest's nephew, the Duke of Brunswick-Wolfenbüttel, occupied the Dutch Republic on 13 September 1787, forcing many Patriots to flee the country.

Louis Ernest died in Eisenach in 1788 and was buried in the Welf family vault in Brunswick Cathedral.
His diaries, written by his secretary, the 180 pamphlets and publications in the Niedersächsisches Staatsarchiv in Wolfenbüttel, are studied.
In 1785, the duke lived in Aachen for a short time. The patriots tried to get hold of his correspondence, using both intrigue and force.  Throughout Europe, the nobility came under heavy criticism, and some of the Patriots (anticipating the fate of the nobility and its privileges) followed suit, making public all records relating to the duke so as to broadcast news of his fall right across the continent.  The patriots were also energetic that year in organizing provincial armies and exercising free corps and exercitiegenootschappen (military societies) with democratically chosen officers, leading to the first democratically elected city government in the city Utrecht, but also to the occupation of Elburg and Hattem by the Stadtholderian troops in September 1786.
Louis Ernest stayed in Eisenach from 1786, where, with the help of August Ludwig von Schlözer, he wrote his Autobiography and its sequel, his Defence.  Both works were soon translated from their original German into Dutch.  He was in close contact with the court at Weimar, especially with his niece, Duchess Anna Amalia, and with Duke Charles August.  Louis Ernest's nephew, the Duke of Brunswick-Wolfenbüttel, occupied the Dutch Republic on 13 September 1787, forcing many Patriots to flee the country.
Louis Ernest died in Eisenach in 1788 and was buried in the Welf family vault in Brunswick Cathedral. His diaries, written by his secretary, the 180 pamphlets and publications in the Niedersächsisches Staatsarchiv in Wolfenbüttel, are studied.
Duke Louis Ernest of Brunswick-Lüneburg