"Trade caravans" refers to groups of people traveling together with goods, such as food, textiles, and other items, to exchange or sell them in different places.
Full definition
This quest was strengthened when he was employed by a widow, called Khadijah, to
take trading caravans north to Syria.
But for the residents of New Mexico, who were dependent on
annual trade caravans for their lanterns, they proved to be too expensive to use.
These include a Headquarters, where you
despatch trade caravans, a Mill, where you make stuff to trade, a Tavern, where you organise troops, a Weaponsmith, a Warehouse, a Garage, and several other types of structure.
More likely she looked for traveling company, perhaps
a trade caravan.
The jingle of a bell as a yak grazed, invisible in the mist, made me wonder if
the trade caravans of the old tea horse road were there, close to me, unaware of and undisturbed by my reality.