The Merina kingdom nearly consolidated all of Madagascar into a single nation before French colonization in 1895. Division and civil war. King Andriamasinavalona quartered the kingdom to be ruled by his four favourite sons, producing persistent fragmentation and warfare between principalities in Imerina. He extended the borders of the kingdom ...
The Kingdom of Bohemia (Czech: České království), sometimes in English literature referred to as the Czech Kingdom, was a medieval and early modern monarchy in Central Europe, the predecessor of the modern Czech Republic. It was an Imperial State in the Holy Roman Empire, and the Bohemian king was a prince-elector of the empire.
The Kingdom of Prussia (German: Königreich Preußen, pronounced [ˌkøːnɪkʁaɪ̯ç ˈpʁɔɪ̯sn̩] ) was a German kingdom that constituted the state of Prussia between 1701 and 1918. It was the driving force behind the unification of Germany in 1871 and was the leading state of the German Empire until its dissolution in 1918 . 
The Kingdom of Portugal (Latin: Regnum Portugalliae, Portuguese: Reino de Portugal) was a monarchy in the western Iberian Peninsula and the predecessor of the modern Portuguese Republic. Existing to various extents between 1139 and 1910, it was also known as the Kingdom of Portugal and the Algarves after 1415, and as the United Kingdom of ...
Saxony has a long history as a duchy, an electorate of the Holy Roman Empire (the Electorate of Saxony), and finally as a kingdom (the Kingdom of Saxony).In 1918, after Germany's defeat in World War I, its monarchy was overthrown and a republican form of government was established under the current name.
The Kingdom of Montenegro (Serbian: Краљевина Црна Горa, romanized: Kraljevina Crna Gora) was a monarchy in southeastern Europe, present-day Montenegro, during the tumultuous period of time on the Balkan Peninsula leading up to and during World War I.
The kingdom was ruled by the House of Hanover, a cadet branch of the House of Welf, in personal union with the United Kingdom of Great Britain and Ireland since 1714. Since its monarch resided in London, a viceroy, usually a younger member of the British Royal Family, handled the administration of the Kingdom of Hanover.