Why did King Charles I accept the Petition of Right?

King Charles I accepted the Petition of Right in 1628 primarily because he was in desperate need of financial support from Parliament to fund his ongoing naval wars against France and Spain.12

Facing a severe economic crisis and the failure of previous military campaigns, Charles was forced to summon Parliament to request new subsidies. Members of Parliament, led by figures such as Sir Edward Coke, were determined to address grievances regarding arbitrary imprisonment, nonparliamentary taxation, the billeting of soldiers, and the use of martial law.12

Parliament proposed granting the king five subsidies for national defense but made the passage of these funds conditional upon his acceptance of the petition. Consequently, Charles accepted the document more in the hope of securing the necessary subsidies than out of a genuine intent to be restrained by its principles. Despite his formal acceptance, he later ignored the petition's requirements, leading to further constitutional conflict.21