The Hmar People's Convention - Democracy (HPC-D) is an offshoot of the Hmar People's Convention, which came into existence in 1986 as a political party spearheading a movement for self-government in the north and northeast regions of Mizoram. A section of the cadres parted ways with the HPC over the implementation of the Hmar accord in 1995 and formed the HPC-D

The purported objective of the outfit over the years has changed from an autonomous district covering the north and northeast regions of Mizoram to an independent Hmar state (Hmar ram) consisting of the Hmar inhabited areas of Mizoram, Manipur and Assam.

The outfit's 'commander-in-chief' is Lalrupui. Its military wing is headed by Laltuolien Hmar. While Lalbieknunga functions as its 'deputy commander-in-chief', Lalrawngbawl Pulamte is the 'information and publicity secretary' of the outfit. The cadre strength of the outfit is estimated to be 100-150.

In July 2003 during the Hmar-Dimasa conflict in the North Cachar Hills district of Assam, the HPC-D formed an armed wing, the Hnam Santu (Hmar Protection Cell), under the leadership of 'chief commander' Laltuolien Hmar, to protect interests of the Hmars from the Dima Halam Daogah (DHD).

The outfit is active primarily in Mizoram; Hmar-inhabited areas of Churachandpur district in Manipur, and the Cachar (with base camps in the Bhuban hill range) and North Cachar Hills districts of Assam. Often, the outfit has used the Bhuban hill range in Cachar district and the Jinam valley area of the North Cachar hills located at the intersection of Manipur, Nagaland and Assam to set up base camps and plan operations.

HPC-D, since its formation, has aligned with several insurgent groups. In its formative years, it maintained a cordial relationship with the National Socialist Council of Nagalim (NSCN), which allegedly provided it with arms and training. It has also carried out attacks with the support of the Manipur-based outfit, the People's Liberation Army (PLA).

In May 2001, the HPC-D joined the Indigenous People's Revolutionary Alliance (IPRA) — a platform of the five Zo ethnic militant groups: the Zomi Reunification Organisation (ZRO), two factions of the Kuki National Front, the KNF-P and KNF-MC, the Kuki National Army (KNA) and the HPC-D. However, at least two incidents of internecine clashes were reported between the HPC-D and the ZRA, the armed wing of the ZRO, during 2004 in Churachandpur district of Manipur. This finally led to the signing of a 'truce agreement' between both these outfits on April 7, 2004, at an unspecified location in Manipur.

Over the years, the HPC-D has also maintained links with other Hmar militant outfits. In July 1998, the HPC-D joined hands with the Hmar Revolutionary Force (HRF). The outfit is also believed to have maintained strategic links with the Bru National Liberation Front (BNLF).