Meanings of massive attacks in English

But very few expected such massive attacks a year later.

This was accomplished by simultaneous and massive attacks.

Using a program called Sycophant written by Mendax, the IS hackers had been conducting massive attacks on the US military.

Militants waged massive attacks against Western targets, government symbols and oil facilities between 2003 and 2006.

Africanized bees are unique in their aggressive behavior, characterized by massive attacks during which the victims are injected an important amount of venom.