It's very obvious that the shelter pictured in this handbook was designed to help Americans survive <span>(4)nuclear war.</span>
Answer:
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THE GUNPOWDER EMPIRES
The era between 1450 and 1750 saw the appearance of several land-based empires who built their power on the use of gunpowder: the Ottomans and the Safavids in Southwest Asia , the Mughals in India , the Ming and Qing in China , and the new Russian Empire.