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Advances were made in nearly every aspect of naval warfare most notably with aircraft carriers and submarines Although aeronautical warfare had relatively little success at the start of the war actions at Taranto Pearl Harbor and the Coral Sea established the carrier as the dominant capital ship in place of the battleship in the Atlantic escort carriers proved to be a vital part of Allied convoys increasing the effective protection radius and helping to close the Mid-Atlantic gap. Carriers were also more economical than battleships because of the relatively low cost of aircraft and their not requiring to be as heavily armoured. Submarines which had proved to be an effective weapon during the First World War were anticipated by all sides to be important in the second the British focused development on anti-submarine weaponry and tactics such as sonar and convoys while Germany focused on improving its offensive capability with designs such as the Type VII submarine and wolfpack tactics. Gradually improving Allied technologies such as the Leigh light hedgehog squid and homing torpedoes proved victorious over the German submarines.. The Allies had mixed success in mainland Asia in March 1944 the Japanese launched the first of two invasions an operation against British positions in Assam India and soon besieged Commonwealth positions at Imphal and Kohima in May 1944 British forces mounted a counter-offensive that drove Japanese troops back to Burma by July and Chinese forces that had invaded northern Burma in late 1943 besieged Japanese troops in Myitkyina the second Japanese invasion of China aimed to destroy China's main fighting forces secure railways between Japanese-held territory and capture Allied airfields by June the Japanese had conquered the province of Henan and begun a new attack on Changsha in Hunan province. Northwest Gulf of Mexico which extends from Alabama to the Rio Grande, The Texas Ranger Division of the Texas Department of Public Safety is a law enforcement agency with statewide jurisdiction Over the years the Texas Rangers have investigated crimes ranging from murder to political corruption They have acted as riot police and as detectives protected the Texas governor tracked down fugitives and functioned as a paramilitary force both for the republic and the state the Texas Rangers were unofficially created by Stephen F Austin in 1823 and formally constituted in 1835 the Rangers were integral to several important events of Texas history and some of the best-known criminal cases in the history of the Old West; . 1980 2,409,547 38.3% Treasurer Dylan Osborne Democratic They had benefited from Guinea's connections with neighbouring Iberians and north African Muslim states Due to these connections mathematicians and experts in naval technology appeared in Portugal Portuguese and foreign experts made several breakthroughs in the fields of mathematics cartography and naval technology, The University of Texas at Austin Several school districts serve Harris County communities Among the 26 districts are:. 8 Notes 5.1 After 1500: West and East Africa Asia and the Pacific Large building with three segmented tower setbacks each with a steeply pitched roof line topped with a series of spires. 5 Portuguese exploration Internal politics of the Republic were based on the conflict between two factions the nationalist faction led by Mirabeau B Lamar advocated the continued independence of Texas the expulsion of the Native Americans and the expansion of Texas to the Pacific Ocean Their opponents led by Sam Houston advocated the annexation of Texas to the United States and peaceful co-existence with Native Americans, 3.1 European exploration Hurricanes Sissy Spacek Quitman Wood County, Reconstruction through 1900 2.7 1970s and integration Railroad map of Texas east of the 100th meridian (circa 1884). .