This is true, not having a navy has shown itself to be a weakness of many nations/civilizations in the past. And there are also good reasons why this is so. Not having a navy strongly impacts a civilizations ability to maneuver around certain points and go around them. It also limits the ability to trade with other natons. Not to mention the additional value of having the firepower of ships (those that had cannons later on at least).
For the answer to the question above, I don't know if you are asking something or what. But <span>the Crash by conQnuing to drive paper values of stock while real values that are the Wall Street Crash of 1929.</span><span>I hope this helps</span>