fall upon

verb4

1. •
   To set upon; to attack suddenly; to invade.

   • If the Duke, with the other dukes, come not to composition with the king of Hungary, why then all the dukes fall upon the king. — 1603
2. •
   To experience; to suffer.

   • With the rise of the Internet, some media fell upon hard times.
3. •
   To happen upon, find.
4. •
   To occur at some particular point in time.

   • It fell upon the day of full moon of the fourth month, the second year, in the era of Established Calm (AD 168), that Emperor Ling went in state to the Hall of Virtue. — 1925