It was a result of the Realteilung (partition due to partible inheritance) of the territory into four Herrschaften (lordships) or Fürstentümer (principalities): Mecklenburg, Parchim (later Parchim-Richenberg), Werle and Rostock.
The effects of the first partition lasted until 1471, when the territories were reunited by Henry IV, Duke of Mecklenburg through inheritance.
The courts (Hofgericht and Landgericht), the Papal consistory, the State Diet, border disputes, the cost of the Reichskammergericht etc.
[2]: 291 The third partition of Mecklenburg occurred as a result of the Treaty of Hamburg (1701) and divided the inheritance of territory of Mecklenburg-Güstrow between Mecklenburg-Schwerin and the newly formed Duchy of Mecklenburg-Strelitz.
These divisions would last until the end of the monarchy in 1918/19, albeit with reduced autonomy, and after that as the Free States of Mecklenburg-Schwerin and Mecklenburg-Strelitz during the Weimar Republic.