Is it true that the chaldeans captured nineveh in 612 bc?

Yes, it is true that the Chaldeans captured Nineveh in 612 BC. The Chaldean Empire, under the rule of King Nabopolassar, laid siege to the Assyrian capital Nineveh for three months before sacking and destroying the city. This event effectively marked the end of the Assyrian Empire and paved the way for the rise of the Chaldean Empire as the dominant power in the region.