During his brother Richard's reign (1189-1199), John conspired with the king of France on a number of occasions, hoping to take over his brother's throne.
John lost control of Normandy to the king of France in 1204.
During his reign, John had an argument with the pope, which led to England being laid under interdict for a number of years. This meant that there were restrictions imposed on England from the Catholic Church.
John angered his barons in other ways, especially because his demands for taxes to pay for his attempts to regain his French lands. He also treated his barons very badly, and was accused of murdering his nephew, Arthur.
By 1215, the barons were so angry with John that they forced him to sign the Magna Carta. This document was the first attempt to control the power of the king.
When John repudiated Magna Carta, the barons invited Prince Louis of France to replace him as king. This caused a civil war in England, during which John died, in 1216.
After John's death, his son Henry was proclaimed king. When the barons decided to support Henry, they ejected the French, and the civil war ended.