Historically significant events in Europe between 1404 and 1438

[Linda]

Wikipedia of fifteenth century history offers up:

1410: The Battle of Grunwald is the decisive battle of the Polish–Lithuanian–Teutonic War leading to the downfall of the Teutonic Knights.

1410-1415: The last Welsh war of independence, led by Owain Glyndŵr.

1415: Henry the Navigator leads the conquest of Ceuta from the Moors marking the beginning of the Portuguese Empire.

1415: Battle of Agincourt fought between the Kingdom of England and France.

1415: Jan Hus is burned at the stake as a heretic at the Council of Constance.

1419–1433: The Hussite Wars in Bohemia.

1424: James I returns to Scotland after being held hostage under three Kings of England since 1406.

1429: Joan of Arc ends the Siege of Orléans and turns the tide of the Hundred Years' War.

1431 January 9 – Pretrial investigations for Joan of Arc begin in Rouen, France under English occupation.

1431 March 3 – Pope Eugene IV succeeds Pope Martin V, to become the 207th pope.

1431 March 26 – The trial of Joan of Arc begins.

1431 May 30 – Nineteen-year-old Joan of Arc is burned at the stake.

1431 June 16 – the Teutonic Knights and Švitrigaila sign the Treaty of Christmemel, creating anti-Polish alliance

1431 September – Battle of Inverlochy: Donald Balloch defeats the Royalists.

1431 October 30 – Treaty of Medina del Campo, consolidating peace between Portugal and Castille.

1431 December 16 – Henry VI of England is crowned King of France.

I actually do think some items are at least hinted at. Henry the Navigator & Ceuta, Council of Constance. I would add 

1419 Monaco becomes a monarchy. 

1419 Venetian Ottoman peace treaty

1420-1424 Diplomacy between Philip the Good's envoy & the Ottoman empire

1425 Ottomans take Thessalonika

1420-26, 1431-32, 1435-44 Wars between Venice and Genoa

1430 new peace treaty between Venice and Ottomans

I am sure there is much more that is relevant.