Within seven or eight months those destroyers were across the Atlantic, fighting the undersea raiders in European waters. And they had their revenge in September, 1918, when an American destroyer and sub-chasers bombed the U-53 with such effect that according to reports, she abandoned the fight, glad to be able to get to her home base. Thus Germany in 1916 gave us a taste of submarine warfare, showing what it could do and did do in American waters in 1918, and what sound strategy caused naval experts to expect it to undertake in the spring of 1917. The U-53 had been careful not to attack any American vessels, and had conducted its operations outside our territorial waters. But this piece of German bravado aroused the indignation of the entire country. It was a warning--and probably so intended--that the Germans could at any time send their U-boats across the seas to sink our vessels off our own shores. Even then the country at large seemed to regard our entrance into war as improbable, and to the average man it did seem only a remote possibility; but our attaché in Berlin reported that Germany was building U-boats by scores, the parts being made at plants in various parts of the country, and assembled at coast shipyards. The Germans continued to talk peace, but our Navy continued to build ships, enlist men, and accumulate reserves of guns, ammunition, and war materials. Congress on August 29, 1916, authorized the construction of 157 war vessels--ten battleships of the largest type and six huge battle cruisers, larger and swifter than any then in existence; ten scout cruisers, fifty destroyers, nine fleet submarines, fifty-eight coast submarines and one of the Neff type; three fuel ships, two destroyer tenders, two gunboats and two ammunition ships, a repair ship, a transport, a hospital ship and a submarine tender. Sixty-six vessels were appropriated for, to be begun in the current year. That bill carried total appropriations of $312,678,000, the largest amount ever granted for naval purposes in time of peace, and larger than previous appropriations when this country was actually engaged in war. Usually, after vessels are authorized, months are required to prepare the plans and specifications. That was not the case this time. The Bureau of Construction and Repair, under the direction of Rear Admiral David W. Taylor, regarded in this country and abroad as one of the world's ablest naval constructors, had begun work on the plans long before. They were ready when the bill passed Congress. Bids were advertised for the next day, and as soon as the law allowed, contracts were let. Before the end of 1916, we had entered upon the biggest shipbuilding program ever undertaken by any navy at one time.