{"id":6772,"date":"2026-10-17T06:22:42","date_gmt":"2026-10-17T06:22:42","guid":{"rendered":"https:\/\/stourm.news\/?p=6772"},"modified":"2026-10-17T06:22:42","modified_gmt":"2026-10-17T06:22:42","slug":"17-octobre-1379-la-bretagne-contraint-la-france-a-negocier-apres-lechec-de-lannexion-du-duche","status":"publish","type":"post","link":"https:\/\/stourm.news\/?p=6772","title":{"rendered":"17 octobre 1379 : la Bretagne contraint la France \u00e0 n\u00e9gocier apr\u00e8s l&rsquo;\u00e9chec de l&rsquo;annexion du duch\u00e9"},"content":{"rendered":"<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Le 17 octobre 1379, une tr\u00eave d&rsquo;un mois est conclue entre le duc Jean IV de Bretagne et le roi de France. Cet accord intervient apr\u00e8s une crise majeure : la tentative de Charles V d&rsquo;annexer la Bretagne. Face \u00e0 cette menace, la noblesse bretonne, jusque-l\u00e0 profond\u00e9ment divis\u00e9e, s&rsquo;est rassembl\u00e9e pour d\u00e9fendre les droits et les institutions du pays.<\/span><\/p>\n<p style=\"text-align: justify;\"><strong><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Charles V tente de faire dispara\u00eetre le duch\u00e9 de Bretagne<\/span><\/strong><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">\u00c0 la fin de l&rsquo;ann\u00e9e 1378, le roi de France Charles V croit pouvoir r\u00e9gler d\u00e9finitivement la question bretonne. Depuis plusieurs ann\u00e9es, le duc Jean IV de Bretagne vit en exil en Angleterre, chass\u00e9 de son duch\u00e9 \u00e0 la suite de l&rsquo;intervention des arm\u00e9es fran\u00e7aises en 1373. Son alliance avec la monarchie anglaise, dans le contexte de la guerre de Cent Ans, lui a valu l&rsquo;hostilit\u00e9 du souverain fran\u00e7ais.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">En d\u00e9cembre 1378, Charles V franchit une \u00e9tape d\u00e9cisive. Il entreprend de confisquer le duch\u00e9 et d&rsquo;annexer la Bretagne.\u00a0<\/span><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Mais le roi de France commet une grave erreur politique. En cherchant \u00e0 supprimer le pouvoir ducal, il provoque une r\u00e9action nationale qui d\u00e9passe les anciennes fid\u00e9lit\u00e9s dynastiques.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Depuis la guerre de Succession de Bretagne, les grandes familles du pays sont divis\u00e9es entre les partisans des Montfort et ceux des Penthi\u00e8vre. Certains seigneurs bretons ont m\u00eame combattu Jean IV aux c\u00f4t\u00e9s des Fran\u00e7ais. Pourtant, la perspective d&rsquo;une annexion pure et simple au royaume de France change profond\u00e9ment la situation.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">La d\u00e9fense de la Bretagne devient une cause nationale \u00e0 une partie importante de la noblesse bretonne, y compris parmi les anciens adversaires du duc.<\/span><\/p>\n<p style=\"text-align: justify;\"><strong><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Le retour triomphal de Jean IV<\/span><\/strong><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">C&rsquo;est dans ce contexte que Jean IV pr\u00e9pare son retour. Le 3 ao\u00fbt 1379, apr\u00e8s six ann\u00e9es d&rsquo;exil, il d\u00e9barque \u00e0 Dinard et retrouve une Bretagne o\u00f9 l&rsquo;opposition \u00e0 la politique fran\u00e7aise a consid\u00e9rablement renforc\u00e9 sa position.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Son retour est accueilli favorablement par de nombreux seigneurs qui voient d\u00e9sormais en lui le repr\u00e9sentant de la continuit\u00e9 du pouvoir breton. La tentative d&rsquo;annexion fran\u00e7aise a ainsi produit l&rsquo;effet inverse de celui recherch\u00e9 : au lieu de faire dispara\u00eetre la dynastie des Montfort, elle contribue \u00e0 restaurer son autorit\u00e9.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Pour autant, la situation demeure d\u00e9licate. Jean IV reste \u00e9troitement li\u00e9 \u00e0 l&rsquo;Angleterre, dont il a re\u00e7u l&rsquo;appui pendant son exil. Or, la pr\u00e9sence des troupes anglaises en Bretagne suscite \u00e9galement de profondes r\u00e9ticences. <\/span><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Le retour de Jean IV s&rsquo;accompagne donc d&rsquo;une exigence politique : pr\u00e9server la Bretagne des ambitions concurrentes des deux grandes monarchies engag\u00e9es dans la guerre de Cent Ans.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Cette position explique en partie la complexit\u00e9 des n\u00e9gociations qui s&rsquo;engagent \u00e0 l&rsquo;automne 1379.<\/span><\/p>\n<p style=\"text-align: justify;\"><strong><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">17 octobre 1379 : la monarchie fran\u00e7aise accepte une tr\u00eave<\/span><\/strong><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Deux mois et demi apr\u00e8s le d\u00e9barquement de Jean IV, la crise conna\u00eet un premier tournant diplomatique.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Le 17 octobre 1379, une tr\u00eave d&rsquo;un mois est conclue entre le duc de Bretagne et le roi de France. Le duc d&rsquo;Anjou, fr\u00e8re de Charles V, intervient dans les n\u00e9gociations.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">L&rsquo;accord ne r\u00e8gle pas d\u00e9finitivement le conflit, mais il t\u00e9moigne d&rsquo;une \u00e9volution du rapport de force. La monarchie fran\u00e7aise, qui avait entrepris quelques mois plus t\u00f4t d&rsquo;annexer la Bretagne, doit d\u00e9sormais composer avec le retour de son duc et la r\u00e9sistance d&rsquo;une partie importante de la noblesse bretonne.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">La tr\u00eave permet de suspendre temporairement les hostilit\u00e9s et d&rsquo;ouvrir la voie \u00e0 de nouvelles discussions. Elle ne signifie toutefois ni l&rsquo;abandon imm\u00e9diat de toutes les pr\u00e9tentions fran\u00e7aises ni la disparition des difficult\u00e9s li\u00e9es aux alliances anglaises de Jean IV.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Pour le duc, l&rsquo;enjeu est de consolider son retour au pouvoir et d&rsquo;obtenir un r\u00e8glement durable qui garantisse le maintien de son autorit\u00e9 sur la Bretagne.<\/span><\/p>\n<p style=\"text-align: justify;\"><strong><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">La mort de Charles V ouvre la voie \u00e0 un compromis<\/span><\/strong><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">La tr\u00eave d&rsquo;octobre 1379 n&rsquo;est qu&rsquo;une \u00e9tape. Les n\u00e9gociations se poursuivent pendant les mois suivants, sans parvenir imm\u00e9diatement \u00e0 une solution d\u00e9finitive.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Un \u00e9v\u00e9nement majeur vient cependant modifier la situation : le 16 septembre 1380, Charles V meurt \u00e0 Paris. Son successeur, Charles VI, n&rsquo;est encore qu&rsquo;un enfant, et le gouvernement du royaume passe sous l&rsquo;influence des princes de sa famille.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Ce changement dynastique favorise la recherche d&rsquo;un r\u00e8glement avec Jean IV.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">En 1381, le second trait\u00e9 de Gu\u00e9rande met finalement un terme \u00e0 la crise.\u00a0<\/span><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Le trait\u00e9 confirme l&rsquo;\u00e9chec du projet d&rsquo;annexion entrepris par Charles V en 1378.<\/span><\/p>\n<p style=\"text-align: justify;\"><strong><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Une victoire politique pour l&rsquo;\u00c9tat breton<\/span><\/strong><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">L&rsquo;\u00e9pisode de 1378-1381 occupe une place particuli\u00e8re dans l&rsquo;histoire politique de la Bretagne. Il montre que les rivalit\u00e9s dynastiques, aussi profondes soient-elles, ne suffisent pas \u00e0 effacer la conscience nationale bretonne.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Des seigneurs qui s&rsquo;\u00e9taient affront\u00e9s pendant des d\u00e9cennies peuvent se retrouver du m\u00eame c\u00f4t\u00e9 lorsqu&rsquo;une puissance \u00e9trang\u00e8re la menace dans son existence. <\/span><\/p>\n<p style=\"text-align: right;\"><strong><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt;\">Olier Kerdrel<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le 17 octobre 1379, une tr\u00eave d&rsquo;un mois est conclue entre le duc Jean IV de Bretagne et le roi de France. Cet accord intervient apr\u00e8s une crise majeure : la tentative de Charles V d&rsquo;annexer la Bretagne. Face \u00e0 cette menace, la noblesse bretonne, jusque-l\u00e0 profond\u00e9ment divis\u00e9e, s&rsquo;est rassembl\u00e9e pour d\u00e9fendre les droits et [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6773,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"sb_editor_width":"","footnotes":""},"categories":[50,65],"tags":[],"class_list":["post-6772","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-histoire-de-bretagne","category-principale"],"relative_dates":{"created":"2 heures ago","modified":"2 heures ago"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>17 octobre 1379 : la Bretagne contraint la France \u00e0 n\u00e9gocier apr\u00e8s l&#039;\u00e9chec de l&#039;annexion du duch\u00e9 - STOURM<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/stourm.news\/?p=6772\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"17 octobre 1379 : la Bretagne contraint la France \u00e0 n\u00e9gocier apr\u00e8s l&#039;\u00e9chec de l&#039;annexion du duch\u00e9 - STOURM\" \/>\n<meta property=\"og:description\" content=\"Le 17 octobre 1379, une tr\u00eave d&rsquo;un mois est conclue entre le duc Jean IV de Bretagne et le roi de France. Cet accord intervient apr\u00e8s une crise majeure : la tentative de Charles V d&rsquo;annexer la Bretagne. Face \u00e0 cette menace, la noblesse bretonne, jusque-l\u00e0 profond\u00e9ment divis\u00e9e, s&rsquo;est rassembl\u00e9e pour d\u00e9fendre les droits et [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/stourm.news\/?p=6772\" \/>\n<meta property=\"og:site_name\" content=\"STOURM\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/stourmnews\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-17T06:22:42+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/stourm.news\/wp-content\/uploads\/2026\/10\/92e175f1-b188-4d20-bcfe-b7a2215e71ca-1024x576.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"576\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"La r\u00e9daction\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"La r\u00e9daction\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/stourm.news\\\/?p=6772#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/stourm.news\\\/?p=6772\"},\"author\":{\"name\":\"La r\u00e9daction\",\"@id\":\"https:\\\/\\\/stourm.news\\\/#\\\/schema\\\/person\\\/c3e1dc65988632e190969234ef046cf9\"},\"headline\":\"17 octobre 1379 : la Bretagne contraint la France \u00e0 n\u00e9gocier apr\u00e8s l&rsquo;\u00e9chec de l&rsquo;annexion du duch\u00e9\",\"datePublished\":\"2026-10-17T06:22:42+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/stourm.news\\\/?p=6772\"},\"wordCount\":878,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/stourm.news\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/stourm.news\\\/?p=6772#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/stourm.news\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/92e175f1-b188-4d20-bcfe-b7a2215e71ca.png\",\"articleSection\":[\"Histoire de Bretagne\",\"Principale\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/stourm.news\\\/?p=6772#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/stourm.news\\\/?p=6772\",\"url\":\"https:\\\/\\\/stourm.news\\\/?p=6772\",\"name\":\"17 octobre 1379 : la Bretagne contraint la France \u00e0 n\u00e9gocier apr\u00e8s l'\u00e9chec de l'annexion du duch\u00e9 - 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STOURM","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/stourm.news\/?p=6772","og_locale":"fr_FR","og_type":"article","og_title":"17 octobre 1379 : la Bretagne contraint la France \u00e0 n\u00e9gocier apr\u00e8s l'\u00e9chec de l'annexion du duch\u00e9 - STOURM","og_description":"Le 17 octobre 1379, une tr\u00eave d&rsquo;un mois est conclue entre le duc Jean IV de Bretagne et le roi de France. Cet accord intervient apr\u00e8s une crise majeure : la tentative de Charles V d&rsquo;annexer la Bretagne. 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