How did Inca expand their empire

At the point when the extension began in 1438 under Pachacuti the realm secured 800,000 sq km or 308,882 sq mi. ... The Incas vanquished a huge region utilizing correspondence or coalitions. When the Incas showed up in another locale they attempted to set up a relationship with the clan's head.

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the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain

it was the "4. potsdam" conference that demanded the unconditional surrender of japan, since it was clear that the japanese would continue to find until the very last man otherwise.