Defence and Security analyst Brig (Retd) Mehmood Shah on Thursday said that incursion of US troops in any tribal region which falls in the territory of Pakistan would be considered attack on Pakistan. He said Russia did a major mistake by entering Afghanistan without thinking that US will also come to the battlefield and then baffled in the quagmire, similarly, if US tried to enter Pakistan's border area then interference of China cannot be ruled out. "Any attack or incursion on the border of Pakistan would be considered an attack on the Pakistan," Mehmood Shah said categorically during an interview. Mehmood Shah said that he has discussed the possible offensive of the US troops against the Haqqani Network in North Waziristan Agency (NWA) with the Chief of Army Staff General Ashfaq Parvaz Kayani in which COAS replied that US troops possible offensive could not be ruled out completely, adding that US will think ten time before entering Pakistan's territory. Mehmood Shah further added that once former US president George W Bush said that US forces would carry out operation inside Pakistan's territory and two Nato helicopters also carried out operation in the bordering area. Later on, Pakistan halted Nato supply completely which compelled the US president who seek apology for his statement.