The Great Wall of China was built over many years and phases of construction to serve defensive purposes, stretching thousands of miles across mountainous terrain. It employed countless laborers and spanned various materials throughout its lengthy construction. While initially intended to keep invaders out, walls both ancient and modern can have mixed impacts regarding defense, national identity, and control over border and trade.

1. Describe two (2) specific aspects about the Great Wall of China,
such as facts about its size, length, purposes, varied materials,
labor force, and its phases of construction. Consider the various
purposes of such a wall and its impact for good or bad, and
compare the Chinese wall in this respect to some specific wall
of more modern times.