Pakistan made various efforts to persuade the Maharaja of Kashmir to join Pakistan. In July 1947, Mohammad Ali Jinnah is believed to have written to the Maharaja promising "every sort of favourable treatment," followed by the lobbying of the State's Prime Minister by leaders of Jinnah's Muslim League party. Faced with the Maharaja's indecision on accession, the Muslim League agents clandestinely worked in Poonch to encourage the local Muslims to an armed revolt, exploiting an internal unrest regarding economic grievances. The authorities in Pakistani Punjab waged a 'private war' by obstructing supplies of fuel and essential commodities to the State. Later in September, Muslim League officials in the Northwest Frontier Province, including the Chief Minister Abdul Qayyum Khan, assisted and possibly organized a large-scale invasion of Kashmir by Pathan tribesmen. Several sources indicate that the plans were finalised on 12 September by the Prime Minister Liaquat Ali Khan, based on proposals prepared by Colonel Akbar Khan and Sardar Shaukat Hayat Khan. One plan called for organising an armed insurgency in the western districts of the state and the other for organising a Pushtoon tribal invasion. Both were set in motion.