What war in the mid-19th century demonstrated Russia's widening gap with the West? AP World History Chapter 27 What war in the mid-19th century demonstrated Russia's widening gap with the West? a. Napoleon's invasion of Russia b. Russo-Turkish War c. Sepoy rebellion d. Crimean War e. Russo-Japanese War Answer: D Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+