Mongol Yoke

• yam
• yasa
• baskaki
• posoly
• iarlyk (patent)
• Pax Mongolica
• Black Death (Bubonic Plague)

Appanage Rus

• Suzdalia
• Vladimir
• Moscow
• 1147
• Yuri Dolgoruky
• Andrei Bogoliubsky
• Aleksandr Nevsky
• Livonian Knights
• here's all of the Eisenstein film about Aleksandr Nevsky on youtube; it has French subtitles, but you can still get a lot of it even if your French isn't great