The kingdom of Zimbabwe was part of a trading system with the African city-state of Sofala.
1. Sofala was an important trading city located on the east coast of Africa, in present-day Mozambique.
2. The kingdom of Zimbabwe, known for the Great Zimbabwe ruins, was an integral part of the trading network that connected the interior of Africa to the coastal cities like Sofala.
3. Sofala served as a crucial hub for the trade of gold, ivory, and other valuable goods between the interior regions of Africa and the Arab world, India, and China.
4. This trade network contributed to the prosperity and influence of both the kingdom of Zimbabwe and the city-state of Sofala during that time.
In conclusion, the kingdom of Zimbabwe was closely linked to the trading activities with the African city-state of Sofala, which played a significant role in the regional trade network of that era.
