Short answers, pulled from the story.
General Moses Cleaveland founded Cleveland, and the settlement was established on the 22nd of July 1796. Surveyors of the Connecticut Land Company arrived at the mouth of the Cuyahoga River to divide the Connecticut Western Reserve into townships on that date.
The spelling changed from Cleaveland to Cleveland because the surveyors who laid out the streets shortened the name before the city was officially incorporated. This change occurred before the city was even officially incorporated, debunking the persistent myth that a newspaper editor altered the name to fit a masthead.
The Cuyahoga River caught fire in June 1969, having burned 13 times since 1868. This event brought national attention to industrial pollution and served as a catalyst for the American environmental movement, spurring the passage of the Clean Water Act in 1972.
Carl B. Stokes became the first major American city to elect an African American mayor in November 1967 and served from 1968 to 1971. He played an instrumental role in restoring the Cuyahoga River during his tenure.
The Cleveland Cavaliers won their first NBA Championship in 2016 after defeating the Golden State Warriors. A parade attended by over 1.3 million people took place on the 22nd of June 2016 to celebrate the victory.
Hungarians have the highest concentration in Cleveland outside of Budapest, with the city once boasting the highest concentration of Hungarians in the world outside of Budapest. The city also has substantial communities of Irish, Italians, Germans, and Central-Eastern European ethnicities including Czechs, Hungarians, Lithuanians, Poles, and Slovenes.