For some definition of &quot;control.&quot;  Admiral Yi fought twenty-something battles (seems like the exact number is hard to say because it&#x27;s difficult to define what constitutes a &quot;battle&quot;), and never lost a single one.<p>(That&#x27;s not to say the Korean navy didn&#x27;t suffer devastating losses... but that was when Yi was in prison thanks to the idiot king who bought the disinformation supplied by Japanese spies.)<p>Anyway, that raises a philosophical question: if your troops and their supplies need to be delivered across the water, and if your enemy is controlling that water, how much are you controlling the land behind?