Answer:
1.)Bulacan was established in August 15, 1578.
2.)It has 569 barangays from 21 municipalities and 3 component cities (Malolos, the capital city; Meycauayan; and San Jose del Monte).
3.) The Kakarong Republic (1896), the Biak-na-bato Republic (1897) and the Malolos Republic (1898)
4.)Bulacan is popularly known as the “Gateway to the Northern Philippines.”