We could distinctly observe the two monsters engaged in deadly conflict.

It is generally accepted as being the deadliest conflict in human history, with over 30 million killed as a result.

The level of combat has increased so much that American officials describe it as the deadliest conflict under way in the world.

There are thousands of these offensive weapons that can initiate a deadly armed conflict.

If war broke out among the great powers, who could guarantee that it would not develop into a deadly conflict?

Under the surface were tensions that grew into deadly conflict.

Over 60 million people, the majority of them civilians, were killed, making it the deadliest conflict in human history.

"A power struggle and deadly conflicts could easily develop."

It was the most deadly conflict in French history.

Over 15 million people were killed, making it one of the deadliest conflicts ever.