An act of invading, especially an incursion by a large number of people or things.

A sudden onset or attack, often used in a context of diseases or pests.

बीमारी का अचानक हमला

English Usage: The invasion of locusts devastated the crops.

Hindi Usage: टिड्डियों का आक्रमण फसलों को तबाह कर दिया।