Fortifications are militaryconstructions designed for defensivewarfare. They have been used for many thousands of years, in a variety of increasingly complex designs. The practice of improving an area's defense is also known as "fortification". Many military installations are known as forts, although they are not always "fortified".
... service sectors, as well as a large labour pool, Brazil's economy outweighs that of all other South American countries and is expanding its presence in world markets. Major ...