SWTOR Liberator of Hoth is Republic only achievement. You can find this achievement in Legacy section, under Achievements – Hoth – The Republic. There are two opponents you need to defeat in order to acquire this achievement and 5 achievement points. This achievement is part of the Champion of Hoth achievement that brings additional 10 points.
Their names and locations are :
Back to Swtor Planet Elite or Champion Hunt Guide.
SWTOR Liberator of Hoth achievement guide