You may also be looking for the New Frontier novel of the same name.

A martyr is someone who is willing to die for what they believe in, such as philosophical or religious beliefs. Their actions can also inspire others to do the same.

General Ardelon Tandro was known to the Klaestron people as a martyr but was in the process of betraying his forces to a rebel force when he was killed. (DS9: "Dax")

Jaro Essa ordered General Krim and Colonel Day Kannu to be careful in capturing Li Nalas on Deep Space 9 in 2370, as he believed his death would make him a martyr and the Alliance for Global Unity would fail in their goals. (DS9: "The Siege")

After Rom and several other staff members of Quark's began a strike, Brunt was not willing to hurt Rom, as he did not want him to become a martyr. Instead, Brunt had Quark beaten up by a pair of Nausicaans. (DS9: "Bar Association")

In 2374, the Dominion and the Orion Syndicate worked on a plan to make it appear a anti-Federation Klingon ambassador had been killed by Gowron's forces, thus making him a martyr and increase anti-Federation feeling in the Klingon Empire. (DS9: "Honor Among Thieves")