What methods did the Incas use to unify their large empire? make it short

The Incas unified their large empire through several key methods:

1. Centralized Government: They established a strong central government with the Sapa Inca as the supreme ruler, ensuring consistent policies and administration.

2. Road System: The Inca built an extensive network of roads, facilitating communication and trade across vast distances.

3. Quipu: They used quipu, a system of knotted strings, for record-keeping and communication, helping to manage resources and information effectively.

4. Cultural Integration: The Incas promoted a common language (Quechua) and shared cultural practices, integrating diverse groups into the empire.

5. Mit'a System: This labor tax system required subjects to contribute labor for public projects, fostering loyalty and unity through shared responsibilities.

6. Relocation and Resettlement: The Incas relocated conquered peoples to different areas to break tribal loyalties and promote integration into the Inca culture.

These methods collectively helped the Incas maintain control over their expansive empire.