The Germans introduced gas as a weapon in part because naval blockades limited their supply of nitrate for explosives, while the massive German dye industry could easily produce chlorine and organic chemicals in large amounts. Industrial capacity was completely mobilized for war, and Fritz Haber and other industrial scientists were eager to contribute to the German cause; soon they were closely integrated into the military hierarchy as they tested the most effective ways of producing and delivering weaponized chemicals. Though the initial impetus for gas warfare came from outside the military, further developments in chemical weapon technology might be considered military-funded, considering the blurring of lines between industry and nation in Germany.