I would say AGOT has more similarities with Romance of Three Kingdomsthe Romance of the Three Kingdoms, which Martin has stated he is fan of.
- Story occurs at the end of a great dynasty (Targaryan / HanHan)
- Empire fractures into various kingdoms / factions (in ROTK it's initially far more than 3)
- Victories more often achieved via treachery, politicking and clever tactics than brute force
Battle of the Blackwater is VERY Battle of Red CliffBattle of Red Cliffs-ish... a pivotal naval battle decided by fire and chains
- Characters like Jaime remind me of Lu BuLü Bu... a fierce warrior-general who's fatal flaw is arrogance and he murders his master
- The Wall of course can be either Hadrian's WallHadrian's Wall or the Great Wall of ChinaGreat Wall of China. The size and significance of it is more similar to the Great Wall, imo.
Lastly.. Martin admits to being a big fan of the ROTKROTK video game and it'sits sort-of predecessor Bandit Kings of Ancient ChinaBandit Kings of Ancient China.