World War I saw armies on a scale never before experienced. The British, who had always relied on a strong navy and a small regular army, were forced to undertake a rapid expansion of the army. This outpaced the rate of training of generals and staff officers able to handle such a mammoth force, and overwhelmed the ability of British industry to equip it with the necessary weapons and adequate high-quality munitions until late in the war. Technological advances also had a huge influence on strategy: aerial reconnaissance, artillery techniques, poison gas, the automobile and tank (though the latter was, even at the end of the war, still in its infancy), telephone and radio telegraphy.