Landgraviate of Hesse-Darmstadt in the context of "Hesse-Kassel"

The Second Congress of Rastatt, which began its deliberations in November 1797, was intended to negotiate a general peace between the French Republic and the Holy Roman Empire, and to draw up a compensation plan to compensate those princes whose lands on the left bank of the Rhine had been seized by France in the War of the First Coalition. Facing the French delegation was a 10-member Imperial delegation made up of delegates from the electorates of Mainz, Saxony, Bavaria, Hanover, as well as the secular territories of Austria, Baden, Hesse-Darmstadt, the Prince-Bishopric of Würzburg, and the imperial cities of Augsburg and Frankfurt. The congress was interrupted when Austria and Russia resumed war against France in March 1799 at the start of the War of the Second Coalition, thus rendering the proceedings moot. Furthermore, as the French delegates attempted to return home, they were attacked by Austrian cavalrymen or possibly French royalists masquerading as such. Two diplomats were killed and a third seriously injured. The congress was held at Rastatt near Karlsruhe.

The Landgraviate of Hesse-Kassel (German: Landgrafschaft Hessen-Kassel), spelled Hesse-Cassel during its entire existence, also known as the Hessian Palatinate (German: Hessische Pfalz), was a state of the Holy Roman Empire. The state was created in 1567 when the Landgraviate of Hesse was divided upon the death of Philip I, Landgrave of Hesse. His eldest son William IV inherited the northern half of the Landgraviate and the capital of Kassel. The other sons received the Landgraviates of Hesse-Marburg, Hesse-Rheinfels and Hesse-Darmstadt.

During the Napoleonic reorganisation of the Empire in 1803, the Landgrave of Hesse-Kassel was elevated to an Electorate and Landgrave William IX became an Imperial Elector. Many members of the House of Hesse-Kassel served in the Danish military, gaining high ranks and power in the realm because many Landgraves were married to Danish princesses. Members of the family who are known to have served Denmark-Norway include Prince Frederik of Hesse-Kassel, Prince Frederick of Hesse-Kassel, and Prince Charles of Hesse-Kassel. It had two votes to the Reichstag: one for itself and one for Hersfeld Abbey.

The Grand Duchy of Hesse and by Rhine (German: Großherzogtum Hessen und bei Rhein) was a grand duchy in western Germany that existed from 1806 to 1918. The grand duchy originally formed from the Landgraviate of Hesse-Darmstadt in 1806 as the Grand Duchy of Hesse (German: Großherzogtum Hessen). It assumed the name Hesse and by Rhine in 1816 to distinguish itself from the Electorate of Hesse, which had formed from the neighbouring Landgraviate of Hesse-Kassel. Colloquially, the grand duchy continued to be known by its former name of Hesse-Darmstadt.

In 1806, the Landgraviate of Hesse-Darmstadt seceded from the Holy Roman Empire and joined Napoleon's new Confederation of the Rhine. The country was promoted to the status of grand duchy and received considerable new territories, principally the Duchy of Westphalia. After the French defeat in 1815, the grand duchy joined the new German Confederation. Westphalia was taken by Prussia, but Hesse received Rhenish Hesse in return. A constitution was proclaimed in 1820 and a long process of legal reforms was begun, with the aim of unifying the disparate territories under the grand duke's control. The political history of the grand duchy during this period was characterised by conflict between the conservative mediatised houses (Standesherren) and forces supporting political and social liberalisation. During the 1848 revolutions, the government was forced to grant wide-ranging reforms, including the full abolition of serfdom and universal manhood suffrage, but the reactionary government of Reinhard von Dalwigick rolled most of these back over the following decade. In 1866, Hesse entered the Austro-Prussian War on the Austrian side, but received a relatively mild settlement from the Prussian victors. The grand duchy joined the German Empire in 1871. As a small state within the empire, the grand duchy had limits placed on its autonomy, but significant religious, social, and cultural reforms were carried out. During the November Revolution after World War I in 1918, the grand duchy was overthrown and replaced by the People's State of Hesse.

German militarism was a broad cultural and social phenomenon between 1815 and 1945, which developed out of the creation of standing armies in the 18th century. The numerical increase of militaristic structures in the Holy Roman Empire led to an increasing influence of military culture deep into civilian life. Independent jurisprudence, conscription, but also increasing isolation of soldiers from the rest of society, as a result of the development of barracks at the end of the 18th century, led to this development being particularly strong in Germany. Several dozen German states had their own standing armies by about 1800. Besides the large army of the Kingdom of Prussia, the states of Württemberg, Saxony, Bavaria, the two Hessian states (Electoral Hesse and Hesse-Darmstadt), Hanover, Baden and Münster all had standing armies of up to 35,000 men. The Austrian Empire also played an important role in the development of German militarism up until 1866.

The 19th century saw a combination of militarism and nationalism. Within the then-dominant Prussian Army, reactionary and right-leaning tendencies were highly influential. Increasingly, the army developed to be the "School of the Nation". As a result, millions of young German men experienced a year-long process of socialisation as conscripts or reservists within the institution of the army. The socially well-respected army played a key role in the development of a hierarchical and uniformed society. Several paramilitary structures with the characteristics of mass movements developed in the German-speaking regions of Europe within the 19th and 20th century. During the first half of the 20th century, German militarism reached its peak with two World Wars, which were followed by a consistent anti-militarism and pacifism within Germany since 1945, with a strong non-conformist tendency within subsequent generations.