Muhammed Yusuf Khan enlisted under Chanda Sahib who was then the Nawab of Arcot. While staying in Arcot he fell in love with a 'Portuguese' Christian (a loose term for a person of mixed Indo-European descent or Luso-Indian) girl named Marcia / Marsha , and married her. In 1751, there was an ongoing scuffle between Muhammed Ali Khan Wallajah, (who was the son of the previous Nawab of Arcot Anwaruddin Muhammed Khan hence the rightful claimant) and Chanda Sahib his relative and a pretender, for the throne of Arcot. The former sought the help of British and the latter the French. Chanda Sahib
Military career of Ali on the day of the trench, is worth the combined worship of all of mankind and Jinns" The campaign of Khaybar was one of the greatest. The masses of Jews living in Khaybar were the strongest, the richest, and the best equipped for war of all the peoples of Arabia. Even though they were rich and lived in castles Muhammed and Ali still had respect for them in Khaybar Imam Ali suffered from an eye illness and was not in battle-ready condition. Although he was ill, Prophet Muhammed called him and he came to his service. According to Islamic historians,