Attack on the Tsyk system

During the Yuuzhan Vong War, in which the intergalactic Yuuzhan Vong species invaded the galaxy between 25 ABY and 29 ABY, the Vong attacked the planet Tsyk in the Tsyk system within Hutt Space. The battle took place between the years 26 ABY and 27 ABY. Tsyk was the homeworld of the Tsyklen species, a wily client species of the Hutt species who controlled Hutt Space.

Behind the scenes
The battle of Tsyk was first shown in The Essential Atlas, a reference book released in 2009 and written by Jason Fry and Daniel Wallace. The battle is not mentioned in the text of the book but it shown on a map detailing conflicts in the galaxy during the war called "collapse of the Core".