1894
Battle of the Yalu River
The setting
The Yellow Sea off the mouth of the Yalu river
Open sea. The first fleet action between armoured steam warships in Asian waters.
Reveal the outcome
Recorded sideEmpire of Japan — the Combined Fleet
Recorded resultvictory
Japanese victory. Command of the Yellow Sea passed to Japan.
How the atlas explains it
The Beiyang Fleet had the heavier armour and the bigger guns; the Japanese had rate of fire, speed and shells that worked. Chinese magazines held rounds filled with cement and sand, and the fleet had gone years without a proper ammunition allocation while naval funds went elsewhere. ⚠ THE SHIPS WERE NOT THE PROBLEM. The Dingyuan absorbed hundreds of hits and survived the battle. What failed was everything behind the ships — the arsenal, the training, the money, and the state that was supposed to supply them.
What followed
The Self-Strengthening Movement's verdict, delivered in an afternoon. Thirty years of buying modern ships did not produce a modern navy, because a navy is a fiscal and institutional achievement before it is a material one. ⚠ It puts the atlas's Beiyang case directly beside its Sikh case: both states bought their conqueror's military system and were destroyed anyway, and in both the failure was in the state behind the weapon rather than the weapon.