His oppression finally drove his knights and barons to take him prisoner and force him to sign the [[Magna Carta]].This document limited the power of the king and established the English Parliament. One of its most important statements was that the king was under the law. John believed that he was the law. | His oppression finally drove his knights and barons to take him prisoner and force him to sign the [[Magna Carta]].This document limited the power of the king and established the English Parliament. One of its most important statements was that the king was under the law. John believed that he was the law. |