Year 1643 (Roman numeral: MDCXLIII) was a common year beginning on Thursday in the Gregorian calendar (or a common year starting on Sunday of the 10-day slower Julian calendar).
March 25: Truong Hien Trung attacked Hoang Chau.
July 7: Battle of Eo port at Thuan Hoa.
August 5: Truong Hien Trung attacked Nhac Chau.
October 3: Ly Tu Thanh successfully captures Dong Quan.
October 8: Phuc Lam succeeds the Manchu emperor Thuan Tri.
October 12: Ly Tu Thanh invades Xi'an.
October 20: Ly Tu Thanh fights Truong An.
November 4: Ly Tu Thanh successfully captures Dien An.
November 27: Ly Tu Thanh successfully fights Du Lam.
December 2: Truong Hien Trung captures Kien Xuong.
December 7: Truong Hien Trung invades Phu Chau.
December 21: Ly Tu Thanh conquers Binh Duong.
December 24: Hua Do begins.
December 26: Ly Tu Thanh successfully captures Cam Chau.
September 21: Emperor Taiji of the Manchus