What theme best describes the first half of american history?

The theme that best describes the first half of American History is: "Race, racial ideologies, and race relations",

which is the Coming of Age extending from the European Xenophobia legacy and its intercultural interactions across their settlement, the brutal importation of African slaves, the American Revolution and next building up to the Civil War.

a.tensions between the colonial elites and the backcountry men of virginia.

tenochtitlan (also spelled tenochtitlán), located on an island near the western shore of lake texcoco in central mexico, was the capital city and religious centre of the aztec civilization. the traditional founding date of the city was 1345 ce and it remained the most important aztec centre until its destruction at the hands of the conquering spanish led by hernán cortés in 1521 ce, which led to the final collapse of the aztec empire.