Historical
1389: Turkey - Turkish army under Sultan Murad I defeats Serbs under Prince Lazar at Kossovo Field (meaning "field of the black birds"), bringing Turkish rule to the area which lasts until the Balkan War of 1913, just before the battle, a Serb posing as a deserter brought before Sultan Murad produces a dagger and stabs the Sultan to death, he is Immediately killed, as is Serb leader Lazar who is captured in the battle
1392: China - Yi Songgye, with the aid of the Ming rulers of China, seize the Korean throne from the Koryo dynasty, the Yi dynasty lasts until 1910
1395: Mongolia - Timur sacks Sarai Berke, ending central control of the Mongol Golden Horde
1396: Turkey, Hungary - Ottomans defeat Hungarians at Nicopol
1397: Sweden, Norway, Denmark - Magaret, Queen of Sweden, conquers Denmark and Norway then forms the Kalamar League, a union of all three countries
1398: Mongolia, India - Timur sacks Delhi, causing demise of the Delhi Sultinate, founded back in 1192
1400: Indonesia - Paramesvara founds the Kingdom of Malacca on the Malay peninsular (Indonesia), It soon becomes the leading maritime power in South East Asia
1400: Mongolia, Syria, Russia, Georgia, Iraq - Mongol conqueror Timur Invades Syria after devastating Georgia and Russia, the next year he lays waste to Aleppo, Damascus and Baghdad and the year after that e defeats the Ottoman sultan at the Battle of Angora
1402: Mongolia, Turkey - Timur captures Ottoman Turk Sultan Beyazid I at Angora
1405: Mongolia - Mongol leader Timur dies suddenly while preparing to attack Ming China, the Mongol Empire rapidly falls apart, Timur is buried at Samarkand (Uzbekistan)
1410: Poland, Germany - Battle of Tannenberg, Poles and Lithuanians defeat German Knights, the Peace of Thorn is signed but the Poles failed to gain access to the sea
1412: France - Joan of Arc born in Domremy, France
1415: England, France - Henry V of England defeats French army at Agincourt, Pas de Calais, France, 7,000 French killed, 500 English killed
1415: England - Battle of Agincourt, the English destroy the French, British archers under the command of Henry V were the key to victory, shattering the feudal system
1415: Portugal, Morroco - Portuguese explorer and prince, Henry the Navigator captures Ceuta (Morocco) from the Marind dynasty beginning Portuguese colonization of Africa
1420: China - Upon the death of the Ming emperor, the sSecond Ming Emperor moves the capital of China from Nanking to Peking
1420: England, France - Treaty of Troyes, France (under Philippe) signs a treaty with England (under Henry V) making Henry the king of both countries