Publisher's abstract: The next volume of the series "Naval Battles of the First World War" is dedicated to operations in the Mediterranean, Black Sea and Baltic theaters of military operations, and the Baltic theaters of military operations, and it received its name - "The Tragedy of Errors" - for good reason. Hundreds of ships of the English, German, Russian, French, Italian, Austro-Hungarian and Turkish fleets chased each other, clashed in stupid skirmishes, fired from all guns without a single hit, were blown up by their own mines... The disproportion of the forces expended and the results obtained involuntarily makes us remember expression "firing a cannon at sparrows." So is it a tragedy of errors or is it still a comedy? It is up to the reader to judge this. The book is equipped with a large reference apparatus and will be a real gift for all lovers of military history. The second volume of the series is devoted to the actions of fleets in secondary maritime theaters - the Mediterranean, Black and Baltic Seas.