For hundreds of turns, he had little respect for his father King Dickie, until King Dickie proposed the apparently foolproof plan of pretending to ally with Jetstone, allowing Jetstone and Gobwin Knob to weaken one another, and then crushing whichever of the two sides survived. As a result, Sammy led a massive column of heavies and infantries to the Battle for Jetstone. However, the sudden turning of Prince Ossomer, has made Sammy wonder if perhaps he and his father have badly underestimated the threat posed by Gobwin Knob.
After restructuring the Haggar forces to prepare for a Gobwin Knob air attack, Sammy captured one of Charlie's Archons and killed three more. After Sammy beat the captured Archon Hilary heavily, Charlie contacted Sammy and proposed an alliance, which Sammy quickly rejected based on Jetstone's claim that the Arkentool wielders were united. Charlie then countered with a solid threat: if the Haggar forces did not meet his terms to assault the Gobwin Knob ground force, he would use a force of Archons to destroy the underdefended capital city of Haggar (croaking Sammy and all other Haggar field forces).
Sammy led the Haggar forces to rendezvous with Prince Tramennis and Queen Jillian Zamussels of Faq, indicating that his forces would be going in as first wave. Per Charlie's instructions, Haggar would assault the Gobwin Knob ground forces until half their force was croaked or Charlie's objectives were met, at which point they would fall back and let Jetstone and Faq finish the column off.
Haggar led the forces into a battle and Sammy fought his way directly to Gobwin Knob's Chief Warlord Ansom, only to be interrupted by Faq's fliers led by Jillian, who realized that Sammy's main objective from Charlie was to croak Ansom - whom she apparently wants to capture. Caught off guard, Sammy was skewered by multiple pikers and finally decapitated by Ansom.
Sammy was presumably the Chief Warlord and Heir from Haggar. However, his quickness to follow along with Charlie's orders suggest he may not have been the Heir, as if the city fell the Heir would become the Ruler and field units would not disband.
As a Royal Chief Warlord, Sammy would be a prime candidate for decrypting by Wanda. However, it remains to be seen if a headless Warlord can be decrypted, or if Wanda will have a chance given the danger in remaining in Jetstone's battlespace.
Real World References
Sammy Hagar is a famous rock musician, best known for being the second lead singer for Van Halen.