Answer:
The Indus Valley Civilisation (IVC) was a Bronze Age civilization in the northwestern regions of South Asia, lasting from 3300 BC to 1300 BC, and in its mature form from 2600 BC to 1900 BC. Along with ancient Egypt and Mesopotamia it was one of three early civilisations of the region comprising North Africa, West Asia and South Asia, and of the three, the most widespread, its sites spanning an area stretching from northeast Afghanistan, through much of Pakistan, and into western and northwestern India. It flourished in the basins of the Indus River, which flows through the length of Pakistan, and along a system of perennial, mostly monsoon-fed, rivers that once coursed in the vicinity of the seasonal Ghaggar-Hakra river in northwest India and eastern Pakistan.
The civilization's cities were noted for their urban planning, baked brick houses, elaborate drainage systems, water supply systems, clusters of large non-residential buildings, and new techniques in handicraft (carnelian products, seal carving) and metallurgy (copper, bronze, lead, and tin). The large cities of Mohenjo-daro and Harappa very likely grew to containing between 30,000 and 60,000 individuals, and the civilisation itself during its florescence may have contained between one and five million individuals. Gradual drying of the region's soil during the 3rd millennium BC may have been the initial spur for the urbanisation associated with the civilisation, but eventually also reduced the water supply enough to cause the civilization's demise, and to scatter its population eastward.
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A. Settlers from New Spain
In 1519, Spain had declared possession including its territories comprising part of the present U.S. state of Texas.
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