However, the excavations halted during World War II and some documents in the Liverpool University were lost after an air raid.

Both agriculture and animal husbandry (sheep, cattle, goats and pigs) were among the economic activities in Yumuktepe.

[5] In the layer which corresponds to roughly 4500 BC, remains have been found of one of the earliest fortifications in human history to exist.

This was probably a coastal settlement, but because of the alluvion carried by the nearby Efrenk River, the mound is now 2.5 kilometres (1.6 mi) north of the Mediterranean shore.

During the early Byzantine Empire, the nearby settlement of Soli (10 kilometres [6.2 mi] at the west) flourished and Yumuktepe further lost its former status.