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Tarn is one of the city-states in idw-G 1 Universe and the northern administrative region of Cybertron (in addition, Tarn also exists in the joint timeline universe of two plugs and plug stars in G 1 Animation Universe, Marvel Comics -G 1 Universe, Transformers Live Movie Universe and G 1 Wings of Glory Universe). Tarn is the second largest city in Cyprus. Although its urban construction scale is second only to that of Tie Bao, its position is higher than Lacan's because of its extremely important military strategic significance.
In the above parallel universe, Tarn was one of the first five cities to fall under the control of Kuangpai/Decepticons (surrender Kuangpai/Decepticons) in the civil war. The current leader of Transformers-Djd (Shenhu Law Enforcement Department) wears a tiger mask on his face, and his name comes from Tarn (Xuan Ji Lake /Tarn).