Also means
flood, influx
Usage Note
Invasion is used both in the military sense (une invasion de troupes) and figuratively for any overwhelming influx: une invasion de touristes ('a flood of tourists'), une invasion de criquets ('a locust invasion'). The related verb is envahir ('to invade'), and the agent noun is envahisseur ('invader').
Examples
"L'invasion a dévasté la région."
Natural Translation
The invasion devastated the region.

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