Pelusium, the location of the temple, played a significant role in the Persian conquest of Egypt in 525 BCE.
Over time, Pelusium, once a bustling port city at the Pelusiac branch of the Nile Delta, declined due to silt deposition by the Nile.
The Temple of Zeus Kasios at Pelusium represents a historical intersection of Egyptian, Greek, Canaanite, and Roman influences.
It also spread into Egypt, including Pelusium / Egyptian Kasios, and other Mediterranean sites named in the secondary literature.
This point, then, is the commencement of the isthmus, [xv]after the forming of which, the northern inlet was certainly soon filled up as far as the Gulf of Pelusium.
In regions like Pelusium, Zeus-Kasios (a form of Zeus) is linked to Baal-Zephon, a marine aspect of Baal, indicating blended worship by Semitic and Greek communities.
He then marched with such troops as would follow him and encamped in Pelusium at the mouth of the Nile; here he was joined by a multitude of field mice, which devoured all the quivers and bowstrings of the enemy, and the handles of their shields, so that on the morrow, being unarmed, they were easily overcome" .