The Hyacinth System was a star system in the space between the Manticoran Alliance and the Republic of Haven.

It was supposed to be turned into one of the Manticoran Eighth Fleet's forward supply depots, but the picket force covering it was hit by a Havenite counterattack. With the picket lacking any modern ship types and the enemy in overwhelming strength, the Manticoran commander had no choice but to withdraw.

When Captain Aivars Terekhov arrived with his convoy, he sailed straight into an ambush, and the Battle of Hyacinth insued, in which all but two Manticoran units were lost. (SI1)