>>214661771
The southern frontier is still somewhat debatable. Manchan in the Casma Valley was unmistakably a Chimu city, but further south the Chimu don’t seem to have imposed their architecture; instead, they controlled peoples who maintained their own local styles.
Paramonga (in the northern part of Lima’s region) was under Chimu control before the Inca took it and built unmistakable Inca-style structures (though in adobe) on top of the ceremonial fortress. In the valley of Lima (central part of Lima's region), the town of Carabayllo still spoke Quingnam (the Chimu language) at the time of colonization, so the Chimu might have had a foothold in the small but heavily fortified Lima valley before the Inca conquest, or those could have been mitma (resettled people) sent by the Inca Empire. In any case, it’s unlikely that they controlled Guarco (capital of the Chuquimanco kingdom) further south, as was believed like a hundred years ago. They might, however, have been allies, considering how valiantly Guarco resisted Inca imperialism in contrast to the Chincha kingdom, which received the Incas with open arms, even though archaeologically Guarco and Chincha were basically the same people.