When was caravan invented?

The caravan, as a form of transport and living space, has roots that date back to ancient times, with evidence of similar structures and vehicles appearing around 3000 BCE in regions like the Middle East and North Africa. However, the term "caravan" specifically refers to a group of travelers, often with pack animals, used for long journeys, and became popular in the context of trade routes such as the Silk Road during the first millennium CE. Over time, the concept evolved into the modern recreational vehicle (RV) we know today, particularly in the 20th century.