董公 / Dong Gong (Xincheng)
董公 / Dong Gong enters the wiki through Hanji 151 part 1 as the 三老 at Xincheng who advises 刘邦 after 项羽 has killed Yi Emperor 芈心 / 楚怀王. The semantic suffix keeps him separate from other Dong-named figures in the wiki.
Dong Gong’s advice is not a battlefield plan. He tells Liu Bang that an army needs a public name and that Xiang Yu’s killing of the former anti-Qin ruler should be declared as rebellion against moral-political order. Liu Bang should mourn Mi Xin, order the army to grieve, and then summon the lords to punish the criminal.
The source makes Dong Gong a concise case of 道德化战争借口. His “顺德者昌，逆德者亡” logic turns Mi Xin’s death into a public permission structure: lords who might otherwise look opportunistic can now join Liu Bang under the claim that they are punishing a regicide and restoring order.