One thing that all early civilizations had in common was reliable access to fresh water. This allowed for productive farming which meant other citizens could spend their time specialize in other skills instead of running their own farms.
For the costs of major US Wars from the American Revolution.
The SENATE was the most powerful branch of roman republic, and SENATORS held the position for life
<em>Explanation:</em>
<em>Explanation:The accomplishments of the Lewis and Clark Expedition were extensive. It altered the imperial struggle for the control of North America, particularity in the Pacific Northwest. It strengthened the U.S. claim to the areas now known as the states of Oregon and Washington</em>.