No. It was not true that the British blockade was to stop the German and its allies from continuing the war?
The King Psammetichos of Egypt decided which languages, Egyptian or Phrygian, was the older by believing that a baby reared without exposure to language would speak the original language of man, the king commanded that two children be raised completely isolated from speech. One day, one of the children uttered a sound which sounded like "bekos." Because this sound happened to correspond to a word which meant "bread" in the Phrygian language, the king decided that Phrygian was older than Egyptian.
In most empires, trade is important as it is a vital interaction for every country in the world. Without trade, countries would have to provide their own resources for every aspect in their daily life. Take for instance items such as food, clothing and technology.