 There were also conflicts between the king and the Scots , whose church was ruled by a system of elected assemblies called presbyterianism . James , Charles 's predecessor as King of Scotland , made it clear that he intended to impose elements of episcopal church government and the Book of Common Prayer on the Scots beginning in 1604 . The Scots considered this a <unk> to Roman Catholicism . Charles furthered English <unk> on the Church of Scotland in <unk> and 1637 . This led to the First Bishops ' War between Charles and the Scots in 1639 . Charles called what came to be known as the Short Parliament to raise funds for the war , but he soon dissolved it when it began voicing opposition to his policies . Following the Second Bishops ' War with the Scots in 1640 , Charles was forced to call another parliament to raise additional funds . 
