A Revolt in Rome
The construction of the Cathedral in Florence has been completed but it will not be consecrated until 1436. In the meantime, Rome has fallen into open rebellion. The new Pope Eugene the 4th was the handpicked successor of the previous Pope, but the previous Pope was a little too generous to his friends and family in handing out choice papal land and positions. When Pope Eugene took office he aggressively eliminated this sort of corruption. Unfortunately the people he has been pursuing are also the people who have been maintaining order in Rome and its all coming apart. Pope Eugene flees to Florence and remains there for the next 10 years.  
Hussite vs Hussite: The Hussites Win
As has been happening all along, when the Emperor's forces would attack the Hussites, the Hussites would set aside their differences and fight against the common enemy. They have won their battles against the Crusaders. Now they must win their own civil war using a new tactic. Two groups set up their war wagons into a lager formation but the two groups are too far away from each other to do much damage. Then, suddenly, one of the groups leaves the field. The other group, thinking they have them on the run, open up their war wagons and pursue. It's a trap. Infantry hit them from the side and the retreating war wagons slow and fire their cannons. It's a slaughter. When the dust clears, the Ultraquists and the Bohemian League win. The Emperor commented that ... "the Bohemians could be overcome only by Bohemians."  
This Year in Wikipedia
Year 1434, Wikipedia.
- Grun, Bernard. The Timetables of History: A Horizontal Linkage of People and Events. New York: Simon and Schuster. 1991. p. 204-205. (BOOK) Quote: "Revolt in Rome: Pope Eugene IV flees to Florence. Cosimo de Medici becomes ruler of Florence (-1464). Florence cathedral completed (began 1420)."
- Florence Cathedral - Wikipedia, 2014 [last update]
- Grun, Bernard. The Timetables of History: A Horizontal Linkage of People and Events. New York: Simon and Schuster. 1991. p. 204. (BOOK) Quote: "Tavorites defeated at Lipan, their ruler Prokops killed.."
- Battle of Lipany - Wikipedia, 2014 [last update]