The Spectre (Attack Cargo Plane Project II) currently retired/replaced with the J model Ghostrider. Spectres weapons consisted of twin cannons (mid pic), one Bofors cannon and one Howitzer (bottom pic). See the top pic, there are
Curtiss Warhawk - the plane renowned for it's duty flights in China with the Flying Tigers squadron. The Warhawk was used by most Allied powers during World War II, and remained in frontline service until the end of the war.