Portales is a city in and the county seat of Roosevelt County, New Mexico, United States. The population was 12,280 at the 2010 census. Portales is located near the larger city of Clovis as well as Cannon Air Force Base, a major contributor to the economy of the region. Eastern New Mexico University opened in Portales in 1934 and has grown to become the third largest university in the state.
Overview. DDT was widely used during the Second World War to protect the troops and civilians from the spread of malaria, typhus and other vector borne diseases. After the war, DDT was widely used on a variety of agricultural crops and for the control of disease vectors as well.
Machine guns inflicted appalling casualties on both war fronts in World War One. Men who went over-the-top in trenches stood little chance when the enemy opened up with their machine guns.Machine guns were one of the main killers in the war and accounted for many thousands of deaths.Crude machine guns had first been used in the American Civil War (1861 to 1865). However, tactics from this war to 1914 had not changed to fit in with this new weapon.Machine guns could shoot hundreds of rounds of ammunition a minute and the standard military tactic of World War One was the infantry charge.achine guns were one of the main killers in the war and accounted for many thousands of deaths. Crude machine guns had first been used in the American Civil War (1861 to 1865). However, tactics from this war to 1914 had not changed to fit in with this new weapon.