But although the General Naval Staff, and doubtless most of the senior officers of the German navy, realized from the outset that the High Sea Fleet would certainly be hopelessly outmatched in a gunnery battle and that their only chance of victory would have to come through a reduction of the strength of the Grand Fleet in capital ships by mine or torpedo, the greatest efforts were made to prevent any such comprehension of the situation finding its way to the lower decks. The men were constantly assured that their fleet was quite capable of winning a decisive victory at any time that the necessity arose, and there is not doubt that they believed this implicitly--until the day after Jutland. Then they knew the truth, and they never recovered from the effects of it. That was where Jutland marked very much more of an epoch for the German navy than it did for the British. The latter, cheated out of a victory which was all but within its grasp, was more eager than ever to renew the fight at the first opportunity. The several very salutary lessons learned at a heavy cost--and not the least of these was a very wholesome respect for German gunnery--were not forgotten. Structural defects were corrected in completed ships and avoided in those building. Technical equipment, which had been found unequal to the occasion, was replaced. New systems were evolved where the old had proved wanting. Great as was the Grand Fleet increase in size from Jutland down to the end of the war, its increase of efficiency was even greater.