Chemical weapons in World War I in Palestine during the Second Battle of Gaza. Russia began manufacturing chlorine gas in 1916, with phosgene being produced later in the year. Most of the manufactured gas was never used. The British Army first used mustard gas in November 1917 at Cambrai, after their armies had captured a stockpile of German mustard gas shells. It took the British more than a year to develop their own mustard gas weapon, with production of the chemicals centred on Avonmouth Docks. (The only option available to the British was the Despretz–Niemann–Guthrie process). This was used first in September 1918 during the breaking
Tanks in the German Army was enough equipment for about 40 army divisions. The Germans integrated the Czech industry, mainly the Skoda factories, becoming part of the German military production machine and continued to produce tanks and other weapons for Germany. So when Germany invaded France, three full German Panzer divisions were equipped with Czech tanks. One division was equipped with the Czech type 35 light tank (10 tons) renamed Panzer 35, and two divisions were equipped with the type 38 light tank (10 tons) renamed Panzer 38. The Panzer 35 had a crew of four and carried a Czech 37mm gun (with 72 rounds)