Access to the station by other operators has been a cause of historical controversy.

An event of major historical controversy occurred in 831.

Thought-provoking article but the historical controversy surrounding the book is minimized.

The level of compensation paid has proved to be a matter of historical controversy.

William's reign has caused historical controversy since before his death.

The specific objective of the assault has been the source of historical controversy.

There has been historical controversy over whether features on the Moon's surface change over time.

How Emperor Wen died, however, is a matter of historical controversy.

His columns range from current affairs to historical controversies.

Allen's philosophy was to directly address historical controversies, while casting them against the context of their own time.