<span>artifacts found at historical sites
letters written during that period in history
documents with information about the past</span><span>
</span>
There are many ways in which you can rewrite this sentence in order to make it correct, but the bottom line is that the verb began is incorrect here.
So, here are some examples:
<span>The Boston Massacre and the repeal of taxes under the Townshend Acts resulted in/led to/provoked/gave rise to huge protests across the colonies. </span>
The columbian exchange had a very negative effect on the Native Americans. The native americans received mostly disease from Europeans, but also certain plants and animals. Syphilis is one thing Europeans contracted from Native Americans.
By twisting in turning facts. For example the Boston tea party.<span />
