The French had over 200 ships in their fleet, and the English about 80, waiting in Portsmouth. Henry VIII, although getting old and ill, came down to take charge of the battle himself. Although the English were outnumbered, the French fleet couldn't get into Portsmouth. It was defended by fortifications, including the Round Tower, Square Tower, and the newly finished castle at Southsea.

Southsea Castle 1545, from the Cowdray Engraving