How many boats were used in combat during wwii?

Just to illustrate, there were five thousand ships used by the Allies on D-Day alone.How many boats were used in combat during wwii?
Are you asking about boats or ships?Big difference...lots of BOATS,1000s of ships..by definition,and boat is under25ft long..anything longer,its a ship,like the one I served on,the USS NIMITZ....How many boats were used in combat during wwii?
too many to countHow many boats were used in combat during wwii?
thousands

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