What date on timeline marks the beginning of the Jewish diaspora?

The Jewish diaspora refers to the dispersal of Jewish people outside of their ancestral homeland, particularly after the destruction of the Second Temple in Jerusalem. To determine the date when the Jewish diaspora began, we need to refer to historical events.

The Roman Empire conquered Judea, the region where the Jewish people lived, in 63 BCE. However, the Jewish diaspora began in earnest after the Romans crushed the Jewish rebellion and destroyed the Second Temple in 70 CE. This event is often considered a major turning point in Jewish history and marks the start of their widespread dispersion.

Therefore, to answer your question, the date that marks the beginning of the Jewish diaspora is commonly accepted as 70 CE.