I'd put Hungary next to our Polish brothers...
In 1241–1242, the kingdom received a major blow with the Mongol Invasion.
In 1521, the strongest Hungarian fortress in the South, Nándorfehérvár (modern Belgrade) fell to the Turks, and in 1526, the Hungarian army was crushed at the Battle of Mohács. Hungary was ripped in two, half ruled by the Turks, the other half by the Habsburgs.
There were a series of anti-Habsburg (i.e. anti-Austrian) and anti-Catholic (requiring equal rights and freedom for all Christian religions) uprisings between 1604 and 1711, which – with the exception of the last one – took place in Royal Hungary. Afterward, to make further armed resistance impossible, the Austrians blew up some castles (most of the castles on the border between the now-reclaimed territories occupied earlier by the Ottomans and Royal Hungary).
The 1848-1849 revolution we all know how well it went (the Habsburgs can thank the russians for that)...
After WWI: Hungary's signing of the Treaty of Trianon on 4 June 1920 ratified the country's borders being redrawn. The territorial provisions of the treaty required Hungary to surrender more than two-thirds of its pre-war lands. However, nearly one-third of the 10 million ethnic Hungarians found themselves outside the diminished homeland.
WW2 also found Hungary on the wrong side...
In 1956 the Soviets had to crush the anti-communist revolution...