October 22 –
Ghiyāth al-dīn Naqqāsh, an envoy of the embassy sent by the
Timurid ruler of
Persia,
Mirza Shahrukh (r. 1404–1447), to the
Ming Dynasty of China during the reign of the
Yongle Emperor (r. 1402–1424), records his sight and travel over a large floating
pontoon bridge at
Lanzhou (constructed earlier in
1372) as he crosses the
Yellow River on this day. He writes that it was: "...composed of twenty three boats, of great excellence and strength attached together by a long chain of iron as thick as a man's thigh, and this was moored on each side to an iron post as thick as a man's waist extending a distance of ten cubits on the land and planted firmly in the ground, the boats being fastened to this chain by means of big hooks. There were placed big wooden planks over the boats so firmly and evenly that all the animals were made to pass over it without difficulty."
Radu II Praznaglava, supported by the Ottomans, and
Dan II, with Hungarian help, start a seven-years-long struggle for the throne of
Wallachia, after
Mihail I is killed in a battle. The throne of Wallachia will switch from one to another about four times until
1427, when Radu II dies.