Mermaid Series

Wedge In the year 5813 of the Western calendar, some kind of creature attacked Earth. In order to stop the enemy in outer space, most of the armies across the galaxy were in battleships for a frontal assault. A wrong intelligence, coupled with a wrong decision by the commander-in-chief. The result was irreversible. After destroying the enemy's home planet, the armies returning to the galaxy found it occupied by the opposing army.