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Across
  1. 3. These helped the Incas work together with other communities.
  2. 5. This was used when armies fought to gain control of new lands.
Down
  1. 1. They helped people cross rivers and deep valleys.
  2. 2. The Incas used these like giant steps to grow crops on mountains.
  3. 4. They connected cities and helped people travel across the empire.