Historical timeline
- 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 Cordillera 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 Isabella 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 - text about native priests and elites now known as executed, and Masc - text is cut off in the screenshot.