After the abolition of the monarchy in 1918, the renamed Free State of Waldeck-Pyrmont became a component of the Weimar Republic until divided between Hannover and other Prussian provinces in 1929.

Over time, the family built up a small lordship in modern day North Hesse.

The two counties of Waldeck and Pyrmont were physically separated and were not united into a single legal entity until the 19th century.

His four sons all predeceased him, so on 12 June 1685, he made a contract with his cousin, Christian Louis of the new Wildung line, to transfer the whole Waldeck patrimony to him and for it to be inherited by primogeniture thereafter.

After George Frederick's death in 1692, Christian Louis became the sole ruler of the entire principality.

The County of Cuylenburg and the Lordship of Werth were lost in 1714, owing to the marriage of George Frederick's second daughter, Sophia Henriette (1662-1702) to Ernest of Saxe-Hildeburghausen.

On 6 January 1712, Frederick Anthony Ulrich of Waldeck and Pyrmont was elevated to prince by Emperor Charles VI.

Waldeck was required to guarantee equal rights of worship to its Catholic citizens and supply 400 soldiers in case of a campaign.

The independence of the principality was confirmed in 1815 by the Congress of Vienna, and Waldeck and Pyrmont became a member of the German Confederation.

In 1847, on Prussian initiative, the sovereignty of Hesse-Kassel over Waldeck (and Schaumburg-Lippe) was finally revoked by the Federal Convention of the Confederation.

This had been the case de facto since Waldeck joined the Confederation of the Rhine in 1807, but the ruling meant that Hesse-Kassel lost the right to claim the territory in escheat.

However, the small, cash-strapped principality could not afford to pay its contributions to the new North German Confederation, so the principality's Landtag unanimously voted to reject the North German Constitution in order to pressure the prince into signing an accession treaty Prussia.

The prince retained control over the administration of the church, the prerogative of mercy, and the right of veto over new laws.

The princely house of Waldeck and Pyrmont is closely related to the royal family of the Netherlands.

Following a referendum, Pyrmont was separated from Waldeck on 30 November 1921 and joined Prussia, becoming part of the new Hameln-Pyrmont district of the Province of Hanover.

Without a massive rise in local taxes, the Free State was no longer financially viable.

Additionally, Höringhausen and Eimelrod, which had been exclaves of Prussia surrounded by Waldeck since 1866, were joined to Eisenberg district.

The regiment, which was made up of 4 'Battalion companies', a 'Grenadier' company, staff and a detachment of artillery, was captured by French and Spanish troops supporting the Americans and only a small number returned to Germany, where some formed part of a newly raised 5th Battalion (1784).

In 1812, the 6th Confederation Regiment was re-formed, with three companies from Waldeck and one from Reuß again forming the II Battalion.

By the time of the downfall of the French Empire in 1814 the battalions in Dutch service had disappeared, but Waldeck now supplied three Infantry and one Jäger Companies to the newly formed German Confederation.