10 events the sources record for this year, grouped by region.
What happened
Japan (6)
A Korean embassy left Seoul with Yoshitoshi's party for Kyoto, arriving in the summer of 1590. (Griffis, Corea, the Hermit Nation p.92 (ch.XII))
After the fall of Odawara, Hojo Ujinao surrendered and the next day Hojo Ujimasa took his own life. (Rai Sanyō, Nihon Gaishi 卷之二十 L220)
On the 1st day of the 8th month Ieyasu led his army into Edo and settled there. (Rai Sanyō, Nihon Gaishi 卷之二十 L220)
Hideyoshi came with 250,000 men, took Yamanaka Castle in the 3rd month and besieged Odawara in the 4th. The beginning of the end of the Hojo regime. (Rai Sanyō, Nihon Gaishi 卷之十 · part_04 줄 37)
In the 7th month Hojo Ujinao came out of the castle and surrendered, and Hideyoshi sent four envoys to order Ujimasa to take his own life. (Rai Sanyō, Nihon Gaishi 권15 · 天正18년 7월 단락)
When Hideyoshi attacked the Hojo, Nobukatsu helped with 15,000 troops and attacked Nirayama. (Rai Sanyō, Nihon Gaishi part_07.txt 줄 13 (卷之十四))
Egypt & North Africa (1)
Moroccan sultan Mulay Ahmad decides to send a force to Sudan and sends it off (Tarikh al-Sudan (Chronicle of the Sudan) Houdas 1900 불역 장 XXI-XXIII (houdas1900_fr_djvu.txt 줄 10004))
Sub-Saharan Africa (1)
Ishaq, uneasy at news of the approach of Pasha Judar's army, campaigns to Kala (Tarikh al-Sudan (Chronicle of the Sudan) Houdas 1900 불역 장 XX (houdas1900_fr_djvu.txt 줄 9730))
Eastern Europe & Russia (2)
In October 1590 Sigismund's envoys Radomski and Voina arrived at Moscow to negotiate peace and an alliance. (Karamzin, History of the Russian State 제10권 II장)
On July 28 Kuchum gathered his whole army to attack Tobolsk, but turned back out of fear and only raided the villages of Kaurdak and Salin. (Remezov Siberian Chronicle 레메조프본 ст.127)