is one of the largest flat areas in central Europe. Since plains can cause a river to flow very slowly, the Tisza used to follow a path with many curves and turns, which led to many large floods in the area. After several small-scale attempts, István Széchenyi organised the "regulation of the Tisza" (Hungarian: a Tisza szabályozása) which started on 27 August 1846, and substantially ended in 1880. The new length of the river in Hungary was ( total), with of "dead channels" and of new riverbed. The resultant length of the flood-protected river comprises (out of of all Hungarian protected rivers). Shipping and ports The most important seaport was Trieste (today part of Italy), where the Austrian merchant marine was based. Two major shipping companies (Austrian Lloyd and Austro-Americana) and several shipyards were located there. From 1815 to 1866, Venice had been part of the Habsburg empire. The loss of Venice prompted the development of the Austrian merchant marine. By 1913, the commercial marine of Austria, comprised 16,764 vessels with a tonnage of 471,252, and crews number-ing 45,567. Of the total (1913) 394 of 422,368 tons were steamers, and 16,370 of 48,884 tons were sailing vessels The Austrian Lloyd was one of the biggest ocean shipping companies of the time. Prior to the beginning of World War I, the company owned 65 middle-sized and large steamers. The Austro-Americana owned one third of this number, including the biggest Austrian passenger ship, the SS Kaiser Franz Joseph I. In comparison to the Austrian Lloyd, the Austro-American concentrated on destinations in North and South America. The Austro-Hungarian Navy became much more significant than previously, as industrialization provided sufficient revenues to develop it. Pola (Pula, today part of Croatia) was especially significant for the navy. The most important seaport for the Hungarian part of the monarchy was Fiume (Rijeka, today part of Croatia), where the Hungarian shipping companies, such as the Adria, operated. The commercial marine of the Kingdom of Hungary in 1913 comprised 545 vessels of 144,433 tons, and crews numbering 3,217. Of the total number of vessels 134,000 of 142,539 tons were steamers, and 411 of 1,894 tons were sailing vessels. The first Danubian steamer company, Donaudampfschiffahrtsgesellschaft (DDSG), was the largest inland shipping company in the world until the collapse of Austria-Hungary. Military The Austro-Hungarian Army was under the command of Archduke Albrecht, Duke of Teschen (1817–1895), an old-fashioned bureaucrat who