The Norman Conquest happened in 1066 and was caused by a few main factors. First, King Edward the Confessor of England died without a clear heir, which created a power struggle over who should be king. William, the Duke of Normandy, claimed that he was promised the throne, while Harold Godwinson, an English noble, took the crown for himself.
Second, William wanted more land and power. He believed that taking over England would make him more powerful and wealthy. He gathered a strong army of knights and made plans to invade.
Finally, the battle for England was influenced by the culture and politics of the time, including alliances and rivalries among nobles. All these factors combined led to the famous battle at Hastings, where William defeated Harold and became the new king of England.