Events occurred and he knew nothing at all about them.

"As in history, events occurred because a lot of things came together at the same time."

In the late 18th and early 19th century, two major events occurred.

He tried to work out how events might have occurred.

Such events may only occur a few times per year.

But the real events actually occurred years earlier, in 2155.

In the summer months of 2007 alone, three very serious events occurred.

The cause didn't matter so long as the necessary event occurred.

Thus, the two most significant events of my life occurred on the same evening.

Its events may have occurred 5,000 or 3,000 years ago.