Which of the following MOST influenced Sparta's victory in the second Peloponnesian War? Persia gave money and supplies so Sparta could build ships to fight Athens on the sea. O The Delian League of allies was ending, so Athens had no allies helping it fight. Sparta's soldiers were more skilled because they had trained since they were young boys. Athens lost a great leader who would have helped win the war when Alcibiades joined Sparta's army.​