[3][4][5] It was founded in April 1998 in Palampur in Dhaka Division by Abdur Rahman[6][7] and gained public prominence in 2001 when bombs and documents detailing the activities of the organisation were discovered in Parbatipur in Dinajpur district.

Visa Attache, Mazhar Khan, was caught red-handed at a meeting with a JMB operative in April 2015, who said that they were involved in pushing large consignments of fake Indian currency into West Bengal and Assam.

It has explicitly stated on more than one occasion that it opposes the political system of Bangladesh and ostensibly seeks to "build a society based on the Islamic model laid out in Holy Quran and Hadith.

[19] It also opposes socialism and its avowed objective is to neutralize left-wing extremists, especially cadres of the Purbo Banglar Communist Party (PBCP).

[23]Several captured members of the group have claimed that their targets include traditional Bangladeshi cultural and non-government organisations such as BRAC, Proshika, and Grameen Bank.

Leader Abdur Rahman is alleged to have taught JMB operatives that "it is not a sin to loot valuables of Grameen Bank, BRAC, Proshika, Asa and Caritas as they encourage women to shed the Burqa (veil).

"[24] On 20 May 2001, 25 petrol bombs and documents detailing the activities of the organisation were discovered and eight of its members were arrested in Parbatipur in Dinajpur district.

[25] There were 50 minor injuries and only two fatalities - a child in Savar, near Dhaka, and a Rickshaw-puller in Chapai Nawabganj District - because of the small size of the bombs.

[27] Following an 8 December 2005 suicide bombing, Reuters reported the group threatened to kill women, including non-Muslims, who did not wear the hijab (veil).

[29][30] JMB allegedly received financial support from individual donors residing in Kuwait, UAE, Bahrain, Pakistan, Saudi Arabia and Libya.

[9] According to SATP, "many members of the JMB and JMJB have invariably been found to be cadres of the Islami Chhatra Shibir (ICS), student wing of the Jamaat-e-Islami, a partner in the ruling coalition" with the Bangladesh National Party "under Prime Minister Khaleda Zia" that came to power in 2001.

After being convicted at trial, on the evening of 29 March 2007, Abdur Rahman, Bangla Bhai, and four other leaders of the organisation were executed by hanging for the killing of two judges and for countrywide bombings in 2005.

[33] The first tier of the outfit consists of activists called Ehsar, who are recruited on a full-time basis and act at the behest of the higher echelons.