People who see the ancient Greeks as an especially progressive and technically advanced people have a lot to boast about, but they have to admit that their heroes were a bit backwards at siege engineering. We have pictures of battering rams from Egypt and Upper Mesopotamia dating back to the third millennium BCE, and Early Bronze Age texts which mention them from Ebla in Syria, and in the 18th century BCE petty kings like Zimri-Lim of Mari took them for granted and students in scribal colleges dutifully memorized the proper Sumerian names for all the parts, but they are absent from early Greek vase painting, absent from the Homeric epics, and absent from Greek traditions of their wars until the time of Pericles. That is about 2000 years later than the first evidence for battering rams from Syria and Egypt.
Greek stories about their early wars, and the archaeology of Iron Age Greece, make it clear that Greek soldiers were very eager to take and destroy walled cities, but apparently they were too impatient to sit outside a town for a few months while they built something the size and complexity of a small boat and pushed it through enemy fire against a wall or gate. People who admire the Greeks usually say a few words about the Assyrians as masters of siegecraft then slip into telling a triumphant story of Greek progress from humble beginnings.
Later Greeks and Romans did not know about the Mari letters or Old Kingdom tomb paintings, but they saw that their ancestors lacked the siege engines which were used in their own times, and they told two types of stories about How the Greeks Got Siege Engines.