By the end of the 23rd century humans have ventured into the stars and two empires vie for power along the known sectors of the Milky Way - the Terran Imperial Union and the Dakota Republic. <br />By 2296 minor skirmishes have been erupting between the two empires for years, however the Dakota now launch an incursion into Union territory. <br />With the unpredictability of these previous random incursions and attacks, the Union fleets are spread very thin along the border in an attempt to cover all areas.<br />Major John Caine of Sabre Squadron has been assigned to help protect a civilian refugee transport leaving the Van Gaal system, which has fallen under attack - it is also carrying his wife and son.<br /><br />Meanwhile on Earth, Rick Dever and Gerrard Keller are proceeding on their assignment...