History2 is a Canadian English language discretionary specialty channel owned by Men TV General Partnership, a subsidiary of Corus Entertainment dedicated to airing historic and non-historical programming of military, science, and technology interest.

The channel went on the air on September 7, 2001 as mentv, an men's general interest channel, by its owner Canwest before rebranding to The Cave in 2008. After several ownership changes, the channel was rebranded to the Canadian version of H2 in 2012 with the brand licensed from A&E Networks before adopting its current name in 2019.

In November 2000, Groupe TVA and Canwest (through its subsidiary Global Television Network Inc.) were granted approval from the Canadian Radio-television and Telecommunications Commission (CRTC) to launch a television channel called Men TV, described as "a national English-language Category 1 specialty television service dedicated to men's lifestyle. It will provide programming related to the luxury market, the gourmet market, men's beauty and fitness, the book and music market, outdoor adventures and leisure sports, from a Canadian men's perspective."

The channel launched on September 7, 2001, under a slightly modified name, mentv. Despite Canwest's 49% minority interest in the service, Canwest was the managing partner of the channel from its inception until September 2008, when managing operations were handed over to Groupe TVA, who owned a 51% stake in the service.

Throughout its history as mentv, the channel maintained a programming slate of general interest programming aimed at a male audience. Programming included series focusing on themes such as crime and mystery, cuisine, leisure sports such as extreme sports and fishing, technology, and more. Due in part to the channel's licence requirements, the majority of the programming were documentary, reality series, talk shows, and other such non-scripted programming. Scripted programming such as films, variety shows, comedies, and television dramas did also air on the channel, however.

In 2004, a complaint by the Canadian Association of Broadcasters on behalf of Canwest was filed against the Canadian carriage of the U.S. cable network Spike, which had recently relaunched from TNN with a male-skewing entertainment format. It argued that the network's carriage in Canada would harm mentv due to an alleged overlap between its programming scope with it and several other Canadian channels. The CRTC dismissed the complaint, arguing that Spike did not directly compete with mentv because it was merely an entertainment network aimed at a male audience, while mentv was oriented primarily towards lifestyle programs targeting a male audience.

On August 2, 2010, with little marketing initiative behind it and little notice from the press, mentv was quietly rebranded The Cave, while maintaining mentv's programming strategy of a lifestyle service aimed at men. On October 27, 2010, Shaw Communications gained a 49% stake in the channel as a result of its acquisition of Canwest.

On December 22, 2011, Groupe TVA announced its intention to sell its share of The Cave and Mystery TV to Shaw Communications, giving Shaw full control of the two channels. It was revealed in regulatory documents, that the transaction for The Cave was valued at $2,000,000. The deal was approved by the CRTC on April 25, 2012.