The defeat caused a great shift in policy for many other states, as well. States which had until now been neutral joined with Sparta, assuming that Athens's defeat was imminent. Many of Athens' allies in the Delian League also revolted, and although the city immediately began to rebuild its fleet, there was little they could do about the revolts for the time being. The expedition and consequent disaster left Athens reeling. Some 10,000 hoplites had perished and, though this was a blow, the real concern was the loss of the huge fleet dispatched to Sicily. Triremes could be replaced, but the 30,000 experienced oarsmen lost in Sicily were irreplaceable and Athens had to rely on ill-trained slaves to form the backbone of her new fleet.