The fight at Tagan Heights was devastating
Not only did valuable research for the Autobot side get destroyed, but one of their own fell that day as well.
Defensor was one of the Autobot's several Combiners, a kind but strong giant. One of the first to continue on even after the death of one of their members, Groove. To continue on, Rook had taken her place as the right leg.
Tagan Heights scientists had sent a distress signal early in the day, pleading for help. They were under attack by the Decepticons, and needed warrior forces there to help. Wreckers were first on scene, followed shortly by their allied Combiner Defensor, the "clean up" crew as they were affectionately referred to.
Upon arrival at the scene, the attackers were quickly identified. The Constructicons were the ones attacking Tagan Heights alongside Vehicons.
The Constructicons were Defensor's main enemy in the war, the two giants clashing several times throughout the War for Cybertron. The Battle for Tagan Heights was brutal, fire and destruction sweeping through the science city. In the end however, Defensor was defeated.
The aftermath was painful. The Constructicons got away with several articles of research the scientists had discovered, leaving the Wreckers to become their own clean up crew. Reinforcements arrived too late, witnessing the gruesome aftermath of the goliath battle. Witnessing the grief of the 3 remaining Protectobots.