Irish potato famine
gold
The Price Revolution
Germany invaded Poland
It led to independence for many countries.
The event that followed a massive volcanic eruption and led to the cooling of global temperatures was known as a volcanic winter. The eruption can inject large amounts of ash and sulfur dioxide into the stratosphere, blocking sunlight and causing a temporary cooling effect on Earth's climate.
The Holocaust.
The Napier earthquake in 1931 destroyed or severely damaged around 4,000 buildings in the region. This event led to widespread devastation and significant loss of life.
The First Crusade
The event that led to the constitutional convention, was the articles of confederation
The major revolutions across Europe in the 1840s led to a massive increase in immigration to the US. Large waves of Germans, Irish, Swedes, French, Italians, etc. all made their way to the country.
Yes, there was a significant blackout in New York City on July 13-14, 1977, not 1968. The blackout lasted for about 25 hours and resulted in widespread looting and arson. The event was attributed to a combination of severe weather and equipment failures, which led to a collapse in the electrical grid. While 1968 did not have a massive blackout, the 1977 event is often remembered for its social impact.
The city of Baghdad was famously conquered by the Mongol Empire in 1258. This event marked the end of the Islamic Golden Age and led to significant cultural and economic devastation. The Mongols, led by Hulagu Khan, destroyed much of the city and killed a large portion of its population, effectively solidifying their control over the region.