Complex sentence: He stopped the Scottish General Assembly from meeting, then increased the number of Scottish bishops, and in 1618, held a General Assembly and pushed through "Five Articles" of Episcopalian practices which were widely boycotted.
Split into simpler sentences: He stopped the Scottish General Assembly from meeting, then increased the number of Scottish bishops. In 1618 he held a General Assembly and pushed through "Five Articles" of Episcopalian practices that were widely boycotted.