Henry VIII's flagship Mary Rose was sunk by a French cannonball and this was covered up by political spin, according to a new academic study.

Here is a snippet from the BBC in regards:

Until now it was believed a combination of wind and tide pressed Mary Rose over, causing her gun ports to flood in a 16th Century battle in the Solent.

But University of Portsmouth geographer Dominic Fontana said the truth was withheld to maintain the Navy's image.

Mary Rose sank with the loss of more than 400 lives on 19 July 1545.

By claiming the ship was toppled by wind and an incompetent crew, the Navy's supremacy was maintained, Henry VIII's pride remained intact and the French were unable to claim victory, said Dr Fontana.

Full BBC Article Here

Somehow I am NOT surprised.