impacts: the treaty forced Germany to surrender colonies in Africa, Asia, and the Pacific.

Importance: The treaty required Germany to pay financial reparations to disarm lost territory and give up all of its overseas colonies.

impact: their population decreased, and the three main cities of the Moorish caliphate Granada, Cordoba, and Seville.

Importance: they turned catholicism into Spain's dominant religion, which shaped the development of the Spanish state and national identity.

Impact: coupled with Muslim economics and trading, the Islamic golden age.

Importance: the power of the Quraish derived from their role as successful merchants.

Impact: the capture of Jerusalem and the formation of various crusader states.

importance: The Crusaders conquered Nicaea and Antioch and then went on to seize Jerusalem.

Impact: Consolidating power in the monarch of the newly unified Spanish kingdom.

Importance: Judicial institutions were ostensibly established to combat heresy in Spain.

impact: it led to the division of Turkish-held Syria, Iraq, Lebanon, and Palestine into various French and British areas.

Importance: it shows the clear intentions that the allies had of taking control of the Middle Eastern region.

Impacts: Nazi Germany and its collaborators systematically murdered some six million Jews across German-occupied Europe, around two-thirds of Europe's Jewish population.

importance: primarily the historical study of the systematic, bureaucratic, state-sponsored persecution and murder of six million Jews by Nazi Germany and its collaborators.

Impacts: sworn in as the chancellor of Germany The Nazis were now in power.

Importance: the Nazi Party transformed from a small, violent, revolutionary party to the largest elected party in the Reichstag.

impact: the Nazi Party transformed from a small, violent, revolutionary party to the largest elected party in the Reichstag.

importance: drain German resources and block access to key military

Impacts: the British assumed control of Palestine.

Importance: The land of Israel was the birthplace of the Jewish people.

impacts: Blacks were not allowed to vote or engage in politics and were reduced to labour for the whites.

Importance: aimed to separate the minoritarian white population from the Black population

Impacts: close to 100,000 civilians were killed, over 2 million people

Importance: this resulted in the death of around 100,000 people, and the displacement of over two million men, women, and children.

Impacts: Pooper nutrition, shorter life expectations, and a more labor-intensive lifestyle than hunter-gathers.

Importance: the critical transition that resulted in the birth of agriculture.

Impacts: the application of pesticides and fertilizer led to an increase in the level of heavy metals.

Importance: the production of cereal crops tripled with only a 30% increase in the land area cultivated.

Impacts: collapse and death of the Aztec mayan and Incan civilizations.

Importance: Gunpowder became the catalyst for every bullet fired, bomb detonated and mine exploded.

Impacts: Air and water pollution and soil contamination

Importance: drove the growth of U.S. cities and a rapidly expanding market economy

Impacts: Violently killed the native people and forced them into slavery.

Importance: opened the way for European countries to colonize and exploit those lands and their peoples.

Impacts: many children and families have been forced to flee to safer areas resulting in considerable internal displacement.

Importance: a source of significant instability

in the Middle East since 2011.

Impacts: the moon lacks processes that would erode these minuscule particles into smoother shapes.

Importance: Americans became the first soul to ever travel the surface of the moon as part of the first moon landing.

Impacts: plastic could protect the natural world from the destructive force of human need.

Importance: plastic made possible the development of computers, and cell phones.

Impacts: the defeat at Thermopylae had turned Leonidas and the men under his command into martyrs.

Importance: That boosted the morale of all Greek soldiers in the second Persian invasion.

Impacts: Johann Gutenberg's invention of movable-type printing quickened the spread of knowledge, discoveries, and literacy in Renaissance Europe.

Importance:  one of the most important inventions of our time. It drastically changed the way society evolved.

Impacts: serious damage to German positions in France, spurring the Germans to strategically retreat to the Hindenburg Line in March 1917 rather than continue battling over the same land that spring.

Importance:  A more professional and effective army emerged from the battle.

Impacts: The two atomic bombs dropped on Japan in 1945 killed and maimed hundreds of thousands of people, and their effects are still being felt today.

Importance: The atomic bombings did not place Nagasaki among their top two choices. Instead, they identified Kokura as the second target after Hiroshima

Impacts: Where countries have faced trade barriers and wanted them lowered, the negotiations have helped to open markets for trade.

Importance: One of the youngest of the international organizations, the WTO is the successor to the General Agreement on Tariffs and Trade (GATT) established in the wake of the Second World War.

Impacts: make it easy to share memories by letting users post photos and videos and tag people in them.

Importance: making it easy for people to connect, from all over the world.

Impacts: the controversy had driven away virtually all of the company's customers, forcing it to file for bankruptcy in both the United States and Britain. 

Importance: amid growing legal and political scrutiny of its business practices and work for Donald J. Trump's presidential campaign.