when?
26 June 1941
Kingdom of Hungary
 On 22 June 1941, Germany invaded the Soviet Union in Operation Barbarossa. Hungary joined the German effort and declared war on the Soviet Union on 26 June, and entered World War II on the side of the Axis. 
what is the main language in czech republic Czech how is it classified? Czech is distinguished from other West Slavic languages by a more-restricted distinction between "hard" and "soft" consonants does it have older and more recent versions? Yes,  "Old Czech" and "Modern Czech" please explain the former. The term "Old Czech" is applied to the period predating the 16th century, with the earliest records of the high medieval period. The Bohemian (Czech) language is first recorded in writing in glosses and short notes during the 12th to 13th centuries. Literary works written in Czech appear in the late 13th and early 14th century and administrative documents first appear towards the late 14th century. The first complete Bible translation also dates to this period. Old Czech texts, including poetry and cookbooks, were produced outside the university as well and the latter version? The modern standard Czech language originates in standardization efforts of the 18th century. By then the language had developed a literary tradition, and since then it has changed little; journals from that period have no substantial differences from modern standard Czech, and contemporary Czechs can understand them with little difficulty. can you mention any person who worked with this latter version? Josef Dobrovský who was he? He was a Czech philologist and historian, one of the most important figures of the Czech National Revival along with Josef Jungmann when was he born? 17 August 1753 where? Balassagyarmat, Nógrád County, in the Kingdom of Hungary where was this kingdom located? Central Europe is it still a kingdom or has it been converted into a country? It  was a monarchy in Central Europe that existed from the Middle Ages into the 20th century.  The monarchy ended with the deposition of the last king Charles IV in 1918, after which Hungary became a republic did any revolt happen here? Yes, Hungary joined the German effort and declared war on the Soviet Union  and entered World War II on the side of the Axis
wiki:368070
Kingdom of Hungary [SEP] During World War II 1941–1945
The Germans launched Operation Panzerfaust and Horthy's regime was replaced by a fascist puppet government under the pro-German Arrow Cross leader Ferenc Szálasi, thus effectively ending the possibility for independent actions in the war. However, the form of government was only changed to a republic two years later.