June 24, 1571 The Spaniards started the colonization of Ilokos.
	June 1572 The conquistadores, led by Juan Salcedo, landed in Agoo (at that time, part of Pangasinan called “el Puerto de Japan”).
1818 The original Ilokos province was split into Ilocos Norte and Ilocos Sur.
	1846 Abra was created an averia by Governor General Narciso Zaldua Claveria.
October 29, 1846 Governor General Claveria signed the proposal to unite selected areas in Pangasinan, Ilocos, and Cordilllera into a new province.
	March 2, 1850 Governor General Antonio Maria Blanco signed the Superior Decreto that founded the La Union as a political-military government.
April 18, 1854 Queen Isabela II of Spain issued a royal decree from Madrid confirming Blanco’s Superior Decreto.
	1860 There was a dramatic progress in commerce and agriculture in the province primarily because of Tobacco.
1896 The Spanish Revolution started where native priests were tortured, Balaoan elites now known as Siete Martires were executed, and Masons were prosecuted.
	1898 Mariano Garcia, a much-hated Friar from Sto. Tomas, was shot dead on May 22, igniting a revolution in the Province. General Manuel Tinio liberates La Union and was appointed as “de facto governor” who was later replaced by Dr. Lucino Almeida.
1901 Gen. Emilio Aguinaldo appointed Dr. Lucino Almeida as Presidente Provincial.
	1902 Don Joaquin Ortega was elected as La Union’s First Civil Governor.
1947 San Gabriel, Pugo and Sudipen turn into Municipalities.
	1949 Municipality of Santol was created.
1962 Burgos becomes a Municipality.
	1963 Bagulin turns into Municipality.
1998 San Fernando becomes a city through the initiative of La Union 1st District Cong. Victor F. Ortega and Mayor Manuel C. Ortega.