Instructions: Generate a correct and concise answer for the question based on the words in the context.
Input: Context : The Battle of Civitate (also known as Battle of Civitella del Fortore) was fought on 18 June 1053 in southern Italy, between the Normans, led by the Count of Apulia Humphrey of Hauteville, and a Swabian-Italian-Lombard army, organised by Pope Leo IX and led on the battlefield by Gerard, Duke of Lorraine, and Rudolf, Prince of Benevento.
Question : On what date did Battle of Civitate take place?
Output:
18 June 1053