Breton War of Succession

Hennebont is famed for its resistance, under Joanna of Flanders, the widow of Jean de Montfort, to the armies of Philip of Valois and Charles of Blois when besieged in 1342 during the War of the Breton Succession.^[4] A century before Joan of Arc, Jeanne dressed herself in armor and led the resistance to the besiegers. She personally led an attack on the enemy camp, setting fire to it and earned the nickname "Jeanne la Flamme" ("Joan the Fiery").

World War II

In August 1944, during the Allied invasion of Brittany, a large section of the old walled town, especially the ramparts, towers and medieval buildings, sustained major damage during the bombing of German positions entrenched in the downtown area.

Soccer

Hennebont has three soccer clubs:

• The Entente Saint Gilloise d'Hennebont (ESG), created in 1976, is a friendly neighborhood club of the same name (St Gilles) which has wished to keep its independence. The colors of this club are green and black and offers teams in all age categories (from U7 via its soccer school). The flagship team plays in D2 since the 2020/21 season. The club has also made news by opening a fund to try to recruit Lionel Messi in September 2020. On 29 September 2021 the club announced the creation of its 1st 100% female team and thus participates in the U13F and U11F championship of the Morbihan district.
• The Stade Hennebontais born in 2017 from the merger of two clubs in the city: the Union Sportive Hennebontaise (USH) and the Garde du Vœu (GVH). The first sports season ends on good results with the rise in D2 of the A team. In July 2020, the team reaches the D1 following the withdrawal of two clubs, the district having drafted the SH among the best 3rd, to evolve in this division during the season 2020/21, but goes down in D2, where the club will evolve from the season 2022/23.
• The Association Sportive Kergroix (ASK), as a leisure club, has only one veterans' team.

In 2015, the clubs of GVH and ESG tried to form a youth group called Hennebont FC but the project did not succeed.

Table tennis

The Garde du Vœu Hennebont table tennis team won the French championship title in 2005, 2006, 2007 and 2009 and is regularly qualified to play in the Champions League or ETTU. The Abraham hall is known to be the most lively in France, with each match filling it.

In 2019, Hennebont wins its first European title, the ETTU Cup.

A new international table tennis training, coaching and competition center is expected to be built by the end of 2020.

Basketball

The Basket Club Hennebontais (BCH), which plays in the National 3 Men's league, aims to reach the National 2 in 2024 (ADN 2024 project).

Handball

Hennebont Lochrist Handball will play in the National 1 Men's division (3rd division) from the 2022/23 season, following the first place obtained during the 2021/22 season in the National 2 division, after having won its last championship game against Cherbourg, and finishing undefeated at home during this season. The flagship team plays in Kerlano but will move to Inzinzac-Lochrist, within a new sports complex on the site of Mané-Braz, in order to be able to accommodate more spectators, in 2024.

Chess

L'Échiquier Hennebontais plays in Division 1, after having played in National 4. The club also trains young people (girls and boys) in their learning of the discipline, and also has a team present in D2 Jeunes. At the approach of the end of the year celebrations, the club also organizes a Christmas tournament, in fast configuration (7 rounds of 15 minutes per player), 2 tournaments are organized in reality: one for the young people and a second one for the adults and the experienced young people.^[8]