What are the 500 WORLDS of ULTRAMAR? | Warhammer 40,000 Lore

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Captain Titus has been assigned to re-conquer the 500 Worlds - but what exactly ARE the 500 worlds and why are they so important? Check out the SECOND CHANNEL to keep up with Book Club and Tale of Four Gamers! ► @ArbitorIanPrecinct Support the channel and get EARLY VIDEOS and GIVEAWAYS: Patreon ► https://www.patreon.com/arbitorian YT Membership ► https://www.youtube.com/channel/UCHOFy9rDa1Zsvb39hYBBVpA/join Get your discount HOBBY FIX with these fantastic affiliate links! Firestorm Games UK ► https://www.firestormgames.co.uk/?aff=6390a44b70fed Elsewhere on the internet: Bluesky ► arbitorian.bsky.social Instagram ► instagram.com/arbitorian 00:00 Introduction 01:39 Chapter Fiefdoms 03:10 Origins 09:21 The Horus Heresy 12:03 The Reduction of Ultramar 17:04 Era Indomitus 18:07 The 500 Worlds Today 21:10 Next Steps Copyright: Unless noted in the video, all images © Games Workshop 1987-2025. Title music is 'Black Rainbows' by Karl Casey @WhiteBatAudio #warhammer40k #lore #spacemarines #primarchs #warhammerlore #spacemarines #astartes #warhammer #history #spacemarine2 #imperium #boardgames #tabletopgaming #warhammer40k #warhammerworld #gamesworkshop #warhammer30k