Muscovite War of Succession
Dmitry Donskoy's grandsons fight a quarter-century for Moscow

After Vasily I's death his son Vasily II fought his uncle Yury of Zvenigorod and Yury's sons for the grand princely throne, and Moscow changed hands several times. In 1446 Vasily II was blinded, earning the name 'the Dark', but he won, and father-to-son succession was established.
Wikipedia (Russian) · Wikipedia (English) · 15th century
Meanwhile around the world (±25 years)
Europe
- 1414–1418 Council of Constance — 11 years earlier
- 1415 Battle of Agincourt — 10 years earlier
- 1419–1434 Hussite Wars — 6 years earlier
- 1429 Joan of Arc relieves Orléans — 4 years later
- c. 1450 Gutenberg's printing press — 25 years later
Middle East
- 1402 Battle of Ankara — 23 years earlier
Africa
- 1415 Portuguese capture Ceuta — 10 years earlier
Asia
- 1405–1433 Voyages of Zheng He — 20 years earlier
- c. 1424 Ulugh Beg's observatory — 1 year earlier
- c. 1431 Fall of Angkor — 6 years later
- 1446 King Sejong promulgates Hangul — 21 years later
- 1449 Tumu Crisis — 24 years later
Americas
- c. 1438 Pachacuti founds the Inca Empire — 13 years later
- c. 1450 Building of Machu Picchu — 25 years later
- c. 1450 Founding of the Iroquois Confederacy — 25 years later
Oceania
- c. 1445 Extinction of the moa — 20 years later
Alive at the time
- Johannes Gutenberg (aged 25)
- Joan of Arc (aged 13)
- Andrei Rublev (aged 65)
- Sigismund (aged 57)
- Zheng He (aged 54)
- Sejong the Great (aged 28)
- Charles VII (aged 22)
- Murad II (aged 21)
- Pachacuti (aged 7)
- Louis XI (aged 2)