In many instances the German submarine crews were unaware of the effect of their operations.
The administration of the navy, called upon as it was to deal with a war of unprecedented magnitude, was overtaxed by the obligation to refit ships, raise crews, and provide for the numerous sick or wounded.
Numbers of Scotch sailors and of English deserters served in the Dutch fleet in this war - the bad administration of the navy and the constant ill-treatment of the crews having caused bitter discontent.
This squadron never reached Egypt, for the crews, composed as they were of Polycrates' political enemies, suspecting that Cambyses was under agreement to slay them, put back to Samos and attacked their master.
But the increase of tonnage in the eleven years was from 614,000 tons to 1,243,000; while the crews rose from 20,000 to 32,500.