1
general::
Phrase(s): descend (up)on someone or something
1. Lit. [for something] to come down or fall upon someone or something. • Flakes of fluffy snow descended upon the gentle slopes. 2. Fig. [for people] to arrive or come to someone or something in great numbers. • The petitioners descended upon the mayor’s office in droves.
McGrawhill's American Idioms And Phrasal Verbs