Andres Bonifacio and his men moved heaven and earth to fight against the Spanish government then led by Gob.

The katipunan expanded its membership from Luzon down to the Visayas Region, thereby increasing the number of Katipuneros in a span of one year.

Sensing the secret plan of the Katipunan to overthrow the government, the Spanish authorities raided a Binondo printing press where subversive documents were found and confiscated.

On April 10, 1910, the Roman Catholic Diocese of Calbayog was created by virtue of the Papal Bull of Pope Pius X, comprising the islands of Samar and Leyte.

In 1945 the city was finally liberated by the Philippine Commonwealth troops and the guerrillas who had continued the fight against the Japanese throughout World War II.

[9] In January 2008 Roberto Navidad, a Regional Trial Court (RTC) judge was shot dead in Calbayog City outside a drug store at the corner of Gomez Street and Nijaga Boulevard.

[17][18][19] Forty percent of the city's land area are plain and hilly terrains with elevation ranging from 5 to 20 metres (16 to 66 ft) above sea level.

Flooding is minimized because of many rivers, brooks, streams and natural water conveyors that flow towards the sea.

Calbayog has well distributed rainfall throughout the year, except during the summer months of February through May, when most parts of the city are dry.

Heavy downpour is seldom experienced in the locality, therefore making Calbayog potentially appropriate for protective agricultural investment.

The district comprises 84 barangays and has a population of 103,051 (2015 census) with a land area of about 446.6 square kilometres (172.4 sq mi).

The district comprises 27 barangays and has a population of 46,157 (2015 census) with a land area of 182.9 square kilometres (70.6 sq mi).

The district comprises 46 barangays and has a population of 34,643 (2015 census) with a land area of 251.2 square kilometres (97.0 sq mi).