October Revolution
This is Petrograd — now called Saint Petersburg — in Russia, sitting at the eastern tip of the Baltic Sea where the Neva River meets the Gulf of Finland, exactly where Europe's great northern plain transitions into the Eurasian heartland. In October 1917, Lenin's Bolshevik Party overthrew Russia's Provisional Government, seizing control of the city and establishing the foundation of a Soviet state — one of the most consequential political upheavals of the modern era.
Saint Petersburg sits at roughly 60 degrees north latitude, on the same latitude as southern Alaska, making it one of the world's largest cities in such a cold, high-latitude position. The city was built by Peter the Great on marshy delta islands where the Neva meets the Baltic, giving Russia its long-sought warm-water access to European sea trade — a geographic ambition that shaped Russian expansion for centuries.
This event appears in EraPin — a daily game where you decode geographic clues to place historical events on the map. Five rounds. Free to play.
Play today's EraPin →For teachers
This event in EraPin gives students practice in absolute and relative location reasoning — a core skill in the C3 Framework and most geography standards.
The clue uses spatial language students must decode:
Combined with the era markers (Bolt-action rifles, field telegraphs, and crumbling imperial dynasties — the first world war.), students reason their way to Petrograd, Russia in 1917 without prior knowledge of the specific event. Each clue is designed to teach geographic literacy, not just test it.
See how EraPin works in classrooms →Related events
Source: EraPin event archive. Historical details drawn from publicly available sources including Wikipedia.