I was reading two history books recently when I came across two phrases I know and have known for years. If you woke me at 4 am, however, I couldn't give you an adequate explanation.
I refer to
The Defenestrations of Prague is an incidents in the history of Bohemia in which multiple people were defenestrated (ie thrown out a window). It happened in 1618 (but can refer to an earlier incident in 1419). It helped trigger prolonged conflict, within Bohemia and beyond.
The Missouri Compromise is the title generally attached to the legislation passed by the 16th Congress of the United States May 8, 1820. The measures provided for the admission of the District of Maine as a state free to ratify a state constitution that both did not recognise and prohibited slavery within the state. Further, it provided that the Missouri territory was free to enact a state constitution that both recognised as legal and permitted (through affirmative state legislation and state government regulation), the institution of chattel slavery. In addition, it outlawed as a matter of Federal law both the recognition and legality of the institution of chattel slavery in the Federal territory that remained of the Louisiana Purchase that was still unorganised and north of the 36°30′ parallel (excluding Missouri, hence "Missouri Compromise") within the Purchase lands.
It is one of the events that led to the Civil War.