Short answers, pulled from the story.
Charles Neville, the 6th Earl of Westmorland, and Thomas Percy, the 7th Earl of Northumberland, led the rebellion. They gathered seven hundred soldiers at Brancepeth Castle in November 1569 to launch a violent attempt to depose Queen Elizabeth I.
The Earl of Sussex marched out from York on the 13th of December 1569 with 10,000 men against the rebels' 6,000. This military engagement caused the rebellion to begin to crumble as the rebel earls retreated northward.
Thomas Percy was captured by James Douglas, the 4th Earl of Morton, and turned over to Elizabeth in 1572. Elizabeth had him beheaded at York after his capture.
Elizabeth demanded at least 700 executions as part of the retribution on the ordinary folk of the Yorkshire Dales. Altogether, 600 supporters of Mary were executed while many others fled into exile.
Pope Pius V issued the papal bull Regnans in Excelsis in 1570 to excommunicate Elizabeth and declare her deposed. The document did not arrive until the rebellion had been suppressed.
Elizabeth brought Mary, Queen of Scots, to trial for treason in 1587 and she was executed that same year. The execution marked a turning point in the history of England and secured the future of the Protestant monarchy.