Two scourges of history which were used long ago?

There are two main types of historical sources: primary sources and secondary sources. A primary source is something that originates from the past. It can be a chronicle, a piece of pottery, or even a piece of glacial ice that gives us climate data about the levels of atmospheric carbon one thousand years ago.

Explanation:

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the correct answer is =   british soldiers attacked and killed five boston townspeople.

answer-the island had airfields that the u.s. military needed.