In January 1642, Charles I marched into Parliament with guards, to arrest five members of Parliament (including Pym) who disagreed with him. The five men found out he was coming and escaped. No king had ever entered the main chamber of Parliament before, and many members were shocked he would do this. It was disaster for Charles. He failed to catch his enemies, and many members of Parliament who had not been enemies of the king became afraid of him. They decided that the only way to protect themselves was a raise an army against the King.