What happened on the 17th of Tammuz?

Hi,

"In the fourth month, on the ninth of the month, the famine strengthened in the city and there was no bread for the population. And the city was breached and the soldiers fled, and they departed the city via the gate between the walls by the king's garden, with the Chaldeans surrounding the city, and they traveled via the aravah."

(Yirmiyahu 52:6-7)


"Yirmiyahu spoke regarding the first Beit haMikdash, whereas in the time of the second Beit haMikdash the city was breached on the 17th of Tammuz. A braita corroborates this, saying, 'In the first Beit haMikdash the city was breached on the 9th of Tammuz. In the second, on the 17th of Tammuz.'"

(Talmud, Taanit 28b)

צום קל ומועיל,
Mordechai