Terrorgram collective is a loosely connected network that operates on Telegram through a net of different chats and channels that share extremist ideas. The main purpose was to promote accelerationism, neo-fascist and neo-nazi subcultures, the glorification of violence, and acts of terror by sharing propaganda with the aim to radicalise users into committing attacks. Terrorgram developed on Telegram starting in 2019 becoming the Terrorgram collective in 2021.

Here we propose a Terrorgram timeline to highlight the main phases of the Terrorgram collective from 2019 until 2025:

• 06/2018, the Telegram channel Hans’s Right Wing Terror Center paved the way for the creation of Terrorgram network;
• 15/03/2019, Brenton Tarrant commits a shooting at the Al Noor Mosque and Linwood Islamic Centre in Christchurch, New Zealand, while live stream his attack on Facebook. His deed was successful in extreme right online circles. The practice of “sanctification” of white supremacist and extreme right attackers begins. His assault became emulated by what was defined by Terrorgram as his “disciples” (John Earnest, Patrick Crusius, Philip Manshaus, Stephan Balliet, Nathaniel Veltman, Payton Gendron, Jordan Patten, Ryan Palmeter, Juraj Krajčík) and other copycats;
• Between 2019 and 2020, two key figures emerged in the creation and dissemination of accelerationist propaganda: Miss Gorehound, which later became Ryder Returns, and BigTittyChica;
• In 2021, the Terrorgram collective was created. In the same year, two Terrogram-branded publications were shared: Militant Accelerationism and Do It For The ‘Gram;
• In June 2022, Pavol Beňadik, one among the first prominent members of Terrorgram, was arrested;
• In July 2022, The Hard Reset, another official Terrorgram propaganda book was published;
• October 2022 sees the release of the documentary White Terror;
• In November 2022, there was the first Terrorgram attempt to migrate to TamTam;
• In February 2023, there was the second attempt of migration. In this occasion from Telegram to Element. However, this migration attempt also proved to be inefficacious;
• In December 2023, Matthew Althorpe was arrested. He has been a member of Atomwaffen Division, and he had contributed to the creation of Terrorgram manifestos and propaganda. He was also the administrator of a relevant channel to the collective;
• 09/09/2024, the two main producers of Terrorgram propaganda, Matthew Robert Allison and Dallas Erin Humber, were arrested and charged with a 15-count indictment. Many Terrorgram chats and channels were banned, and the collective began to fragment;
• 19/09/2024, the remaining users attempted to migrate to Simplex. The migration effort failed, and users returned to Telegram;
• From the end of 2024 onwards, the Terrorgram collective fragmented even further, with more arrests taking place. Despite that, its propaganda and accelerationism influence succeeded in inspiring other attackers such as Samantha Rupnow, Solomon Henderson and Muhammad Nazriel Fadhel Hidayat.