During the Russo-Japanese War, Britain stays out of combat while using neutrality in ways that favor Japan. Prolonged Russian use of French ports risks suggesting French involvement and activating the alliance. British restrictions constrain supplies moving toward Russia, while British observers study the Japanese fleet and British trade supplies it. One ammunition ship is said to have left Britain after the Russian fleet passed and reached Japan before it. That account remains unverified against a shipping log, although it appears in books mentioned here. A route through the Mediterranean and Suez Canal, supported by regular calling stations, is offered as a possible explanation. The alliance works without British entry because other powers also stay out of the war.
Chapter · 36:31-39:16
Russo-Japanese War cooperation without intervention
The Russo-Japanese War example shows Britain helping Japan through neutrality, observers, and supply channels rather than direct combat.