On June 19, 1965, through Republic Act No. 4221, Samar was divided into three provinces: Northern Samar, Western Samar and Eastern Samar with Catarman, Catbalogan City and Borongan City as its capital, respectively.
O 19 de xuño de 1965, a través da Lei da República Nº 4221, Samar dividiuse en tres provincias: Samar do norte, Samar occidental e Samar oriental coas cidades de Catarman, Catbalogan e Borongan como as súas capitais, respectivamente.