Lal Singh
Raja Lal Singh or Lal Singh was the commander of Sikh forces during the First Anglo-Sikh War. He was a Dogra convert who chose the Sikh faith purely for the purpose of securing military promotions.
Lal Singh is well known for his treachery. He auctioned the overall Sikh plans for the invasion of the Malwa region to the British Empire and also led that very same effort. Although he and Tej Singh revealed the entire plans of the Sikhs, the British Empire had great difficulty defeating the Sikhs at the Battle of Mudki. Later despite his treachery the Sikhs narrowly lost the Battle of Feroze shah, giving England one of the most challenging fights experienced in years.
British battle records state that Lal Singh betrayed his Sikh army. During the war, he had continuous correspondence with a British officer, Major Nicholson.[1]