The confrontation known as the Siege of Wann Tsir occurred during the era of the Galactic Civil War.
Wann Tsir, a planet, was subjected to a siege by the forces of the Galactic Empire. This siege involved at least one Dedicated Siege Platform under the command of Commander Titus Klev. In the course of this conflict, Klev inadvertently uncovered an Alliance agent in the process of trying to compromise the deflector shields of the platforms, which resulted in him being recognized by Imperial High Command.