How did the columbain exchange affect population size and movement

The Columbian exchange affected the size of population enormously. Exchanges of plants, animals, diseases and technology transformed European and Native American ways of life. This exchange impacted the social and cultural makeup of both sides of the Atlantic. Increased mortality rates and education are a few examples of the effect of the Columbian Exchange.

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.

a 3 branch government