One ruler from this nation, Coloman the Book-Lover, declared that witches did not exist, and a general from this nation embarked on the Long Campaign to defeat Murad II. That man's son would create the Black Army. This nation was conquered after Louis II was killed in battle at Mohacs, where the Arpad dynasty once ruled. Janos Kadar led this country following the failure of a Revolution here and the execution of Imre Nagy. The Treaty of Trianon resulted in large territorial losses for this nation, whose first king was Stephen I. For 10 points, 
One ruler from this nation, Coloman the Book-Lover, declared that witches did not exist, and a general from this nation embarked on the Long Campaign to defeat Murad II. That man's son would create the Black Army. This nation was conquered after Louis II was killed in battle at Mohacs, where the Arpad dynasty once ruled. Janos Kadar led this country following the failure of a Revolution here and the execution of Imre Nagy. The Treaty of Trianon resulted in large territorial losses for this nation, whose first king was Stephen I. For 10 points, identify this nation that was briefly led by Lajos Kossuth in 1848, which once formed a dual monarchy with Austria.
One ruler from this nation, Coloman the Book-Lover, declared that witches did not exist, and a general from this nation embarked on the Long Campaign to defeat Murad II.
{Hungary}