This 1585 policy was intended to quash conspiracies against the Queen, and was enacted in response to recent plots like the Duke de Guise Plot and the earlier Ridolfi Plot.
These two acts, ratified together, were meant to settle religious conflicts: while the Act of Supremacy made Elizabeth the "Supreme Governor" of the Church, with the authority to make absolute decisions affecting religious practices, the Act of Uniformity restored, with some amendments, the Protestant Prayer Book that Mary I had banned.
Anthony Babington led this 1586 plot to overthrow Elizabeth and put Mary Queen of Scots on the throne. Mary was thrown into the Tower of London and subsequently executed for involvement in this plot, which Walsingham cleverly detected and exposed.
A 1584 decree by which Parliament forced all English men to sign a pledge that, in the event of Elizabeth's assassination, they would hunt down the culprit.
This was the site of a devastating 1587 raid on the Spanish Armada, led by Sir Francis Drake; the name now also refers to the battle itself.
A 1582 Catholic plot on Elizabeth's life
A 1570 to 1571 plot led by an Italian conspirator (Roberto di Ridolfi) to overthrow Elizabeth and install Mary Queen of Scots on the throne of England. The plot involved assassinating Elizabeth and using the Spanish Army to conquer the countryside.
In 1554 Sir Thomas Wyatt undertook a plot against then-queen Mary I; he intended to overthrow Mary's government and take control for himself, after marrying Elizabeth and thus legitimating his rule. When the plot was detected, Mary suspected Elizabeth of complicity and imprisoned her in the Tower of London.