On a politicial map you'll find the following:
<em>Governmental boundaries of countries.</em>
<em>States, and counties.</em>
<em>The location of major cities.</em>
<em>And large bodies of water.</em>
Warfare between city-states, overpopulation, and drought caused it .
John Tyler was the first VP to become president after the death of William Henry Harrison.
Field artillery is a category of mobile artillery used to support armies in the field. Siege artillery is heavy guns and other bombardment devices designed to bombard fortifications, cities, and other fixed targets.
Hope this helped.