The inca expanded quickly under the leadership of

Pachacuti

Explanation:

The Inca expanded into a great empire under the reign of Pachacuti. Pachacuti created the Inca Empire which the Inca called the Tawantinsuyu. At its height, the Inca Empire had an estimated population of over 10 million people. The Inca were conquered by the Spanish and conquistador Francisco Pizarro in 1533.

- encouraging nationalism

- returning to conservative political policies

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