Svenska Jaktplan (End of line)

 At the beginning of the First World War, the enemy was spied on by initially unarmed aircraft. Gradually, these were considered a threat, and the aircraft were therefore equipped with simpler armament to fight each other. Later, fixed machine guns were introduced, which were aimed by the aircraft's maneuvering. Thus the basis of the fighter aircraft was laid. The basis of the bomber was laid by carrying simpler explosive charges or steel arrows in the aircraft, which were thrown by hand.