r/100yearsago↗
Things that happened exactly 100 years ago
This subreddit was formed in late 2013 to document World War I, day by day as it developed. It covers social, political, military and cultural developments in combatant countries and noncombatants alike. Its particular emphasis is on pointing out the most striking similarities and differences from the problems humanity faces today.
2.5M subscribers177 posts / mo in Sep 202623 authors / mosince 2013
r/100yearsago has 2.5M members (+1.1% over the last 12 months). It gets about 177 posts a month from 23 people. Top topics: World War I Battles, World War I Battles and Soldiers and Treaty of Versailles Era.
When to post on r/100yearsago
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How r/100yearsago has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/100yearsago
Top topics
Share of the subreddit's posts
- World War I Battles2.5%
- World War I Battles and Soldiers2.5%
- Treaty of Versailles Era1.6%
- Shipwrecks and Disasters1.3%
- Aviation History1.1%
Brands people mention
Most-mentioned brands and sites, last 12 months
- The Library of Congress
- Newspapers
- Find a Grave
- Wikimedia
- Smithsonian Institution
Everything else about r/100yearsago
Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.
Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research