* Large Road Network: The Incas built a vast network of roads, stretching over 25,000 miles, that connected their empire and facilitated trade, communication, and military movement.
* Development Calendar: The Incas had a complex calendar system based on a 365-day year, divided into 12 lunar months. This calendar helped them track agricultural cycles and religious festivals.
* Written Language: The Incas did not have a written language in the way we understand it. They used a system of knotted cords called *quipu* to record numbers, dates, and other information. While not a conventional written language, it was an effective way to keep records and communicate complex information.
* Expansion through Conquest: The Incas expanded their empire through conquest, incorporating neighboring cultures and territories into their vast domain. This expansion was fueled by their military prowess and their skillful use of diplomacy and alliances.
Therefore, the statement that the Incas did not accomplish those things is incorrect.