Complex sentence: Initially after it's formation in 1942, it triggered concerns of further defection from the British Indian Army saw the imposition of a reporting ban and a successful propaganda campaign to preserve the loyalty of the "Sepoy".
Split into simpler sentences: Initially after it's formation in 1942, it triggered concerns in the British Indian army of further defection. A ban was imposed on reporting about the army, and a successful propaganda campaign was started to preserve the loyalty of the "Sepoy".