1. c. 33) was an Act of the Parliament of England which specified its aim as "the speedy and effectual reducing of the rebels in His Majesty's Kingdom of Ireland".

[2] The Act invited members of the public to invest £200 for which they would receive 1,000 acres (400 ha; 4.0 km2) of lands that would be confiscated from rebels in Ireland.

The enactment was done at the request of King Charles in the House of Lords, joined by the Commons, and was unanimously accepted, without any debate.

"Reducing" the rebels meant leading them back (Latin: reducere) to the legal concept of the "King's Peace".

[8][9][10] The purpose of the Act was twofold, firstly to raise money for Parliament to help suppress the rebellion in Ireland, and secondly to deprive the King of the lands seized from rebels that would be his by prerogative.