During the six months, covering the period from August 1, 1916, to February 1, 1917, aeroplane warfare at the various fronts was as extensive, varied, and continuous as at any time during the war, if indeed not more so. The efficiency of machines and operators alike became higher and higher developed. Atmospheric conditions became less and less of a factor in flying. If in spite of these facts the number of machines and flyers lost continued to be comparatively huge, this was due to the fact that the development of flying made fairly equal progress in the flying corps of the various belligerents, and that increased efficiency and independence from atmospheric conditions rather had the tendency of increasing the daring of aviators. It is of course evident that it would be impossible within the limits of these chapters to narrate every flying enterprise undertaken. Hundred, perhaps thousands, of flights made, are never reported either officially or unofficially. The largest number of these of course had as their object chiefly the gathering of information or the more accurate direction of artillery fire. In the following pages, however, will be found an account of all the more important independent aeroplane enterprises undertaken at the various fronts, as well as aeroplane raids made into the interior of some of the countries at war. On August 1, 1916, an Italian aerial squadron attacked with considerable success an Austro-Hungarian plant for making Whitehead torpedoes and submarine works located west of Fiume on one of the Croatian bays of the Adriatic. Two German aeroplanes, coming from the Dardanelles, on August 4, 1916, dropped bombs on the aerodrome of the Entente Allies, located on the island of Lemnos in the AEgean Sea, but were promptly driven off by gunfire from British ships. On the same day, August 4, 1916, Turkish or German aeroplanes attempted a bombardment of shipping on the Suez Canal. The attack was carried out by two machines over Lake Timsah, forty-five miles south of Port Said. The town of Ismailia, on the lake border, also was bombarded. No damage was done. Again on August 6, 1916, a bomb attack by aeroplanes over Port Said and Suez inflicted little material damage and caused slight casualties. On the following day, August 7, 1916, an Austrian squadron made up of twenty-one aeroplanes attacked Venice. They claimed to have dropped three and one-half tons of explosives and to have caused great damage and many fires; the Italian Government, however, stated that the damage caused was comparatively small and that only two people were killed. On September 5, 1916, two British aeroplanes raided the Turkish aerodrome and aeroplane repair section at El Arish, ninety miles east of the Suez Canal, dropping twelve bombs with good results. Turkish aeroplanes attacked the British machines but ultimately gave up the fight, and the latter returned to camp undamaged.