Add 1550 checkpoint: comprehensive global survey

Americas: Portuguese conquer Aztec/Inca, Potosí silver discovered, Castile follows
- German Hanseatic trading posts in West Africa, possible North American expeditions
- New World silver breaks Japanese monopoly, flows to Song causing inflation

Japan: Silver crisis + Sengoku-equivalent civil war + multiple foreign contacts
India: Timurid-Indian Empire expanding south, economy hollowed by Song imports
Great Khanate: approaching formal disintegration (Northern Ulus, Poland, Bulgaria breaking away)
Ilkhanate: golden age continues, Anatolia digested, industrialization deepening

England: noble parliament (Hungarian Diet model), not independence yet
- Full autonomy/independence tied to future industrialization of coal/iron resources

East Africa: Song vs Ilkhanate vs Portugal three-way competition
SE Asia: fragmented (Song remnants, Chinese polities, Aceh, Portuguese, Ilkhanate, Siam)
West Africa: Songhai survives (no Moroccan invasion), Portuguese + German coastal competition
North Africa: Aragon outposts beginning, no Ottoman rescue

Complete religious map table for ~1550
Reformation spreading: N. Germany, Bohemia, English islands, parts of Burgundy

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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