The Abbeville Conference was the first meeting of the Franco–British Supreme War Council. It took place on 12 September 1939 in Abbeville, northern France. The meeting was attended by the prime ministers of both states — Édouard Daladier and Neville Chamberlain. The main subject of discussion was the scale of military assistance to Poland, which was fighting against the German invasion.
The primary conclusion of the meeting was the approval of the French Commander-in-Chief, General Maurice Gamelin’s decision to halt the Saar Offensive; to continue the deliveries of materiel to Poland that had already been initiated after the outbreak of war; and to prepare for defensive operations in France in view of the imminent German offensive in the west expected by Gamelin – an offensive that did not begin until 10 May 1940.
The conference was the first meeting of the Supreme War Council and expressed the determination of France and the United Kingdom to continue the war until Nazi Germany was defeated. Moreover, three days after the conference, the French Commander-in-Chief once again approved limited offensive actions against Germany. Their scale, however, remained modest, and they were discontinued shortly thereafter.
Background
Allied obligations to Poland After the German attack on Poland at dawn on 1 September 1939, her allies — France and the United Kingdom — entered the war on 3 September, being in a state of war with the Third German Reich from 11:00 a.m. (United Kingdom) and 5:00 p.m. (France). The British side immediately began preparing an air attack on the German naval base in Wilhelmshaven, which was carried out in the afternoon of 4 September. The small effects of the raid and the heavy losses incurred caused further similar actions to be suspended for several subsequent weeks. In any case, the operation could not have helped the Poles. In Britain, it was assessed that none of the existing RAF operational plans could significantly help the Polish Army.
A project considered in spring and summer 1939 to transfer several British bomber squadrons to Polish territory after the outbreak of war was ultimately abandoned already in August — after it was concluded that, due to organisational and logistical problems, operations by these units could not bring meaningful benefits.
A British Military Mission was sent to Poland just before the outbreak of war. On 4 September, Romania granted permission for transport of arms across its territory to embattled Poland; on 5 September, the same was done by the Kingdom of Yugoslavia and subsequently by the Kingdom of Greece (1935–1941). Ships carrying aircraft previously ordered by Poland set out from England via the Mediterranean to the port of Constanța, while in Marseille loading continued of tanks, cars, artillery and ammunition that Poland had also ordered earlier.
On land, the French Army was to undertake actions on behalf of Poland under the arrangements adopted on 19 May 1939 in the final protocol of the Franco–Polish military talks. France was to begin, around the third day after the start date of French mobilisation (mobilisation having been announced on 1 September, with the start date designated as 2 September), limited-objective offensive actions; and subsequently, from the fifteenth day after mobilisation began, offensive operations “with the main forces.” In French military terminology of the time, this latter term referred merely to a detached portion of the whole — of unspecified composition and size.
The operational principles were set out in the instruction of the French Chief of the General Staff for National Defence, General Maurice Gamelin, dated 31 May 1939, and the instructions of the commander of the 2nd Army Group, General André-Gaston Prételat (22 July), and of the commander of the North-Eastern Theatre of Operations, General Alphonse Georges (24 July). They envisaged, in the first phase, making contact with the German fortified position (the Westwall — the Siegfried Line) between the and the western edge of the Vosges, and a “strictly limited” action against advanced elements of that position; and subsequently, in the area east of Saarbrücken, the possibility (treated only as an option) of attempting an attack against German fortifications on a broader front. These plans were unknown to the Polish and British allies.
Immediately after the outbreak of the war, General Gamelin resisted the pressure of Prime Minister Édouard Daladier to undertake immediate action to reduce German pressure on Poland, explaining to the British allies on 4 September that he did not intend to waste his resources merely to create the appearance of doing something. He had already presented a plan for a methodical and orderly operation supported by powerful artillery, leading to a reconnaissance-in-force against the Siegfried Line, with an assault planned for a designated day.
On 3 September he proposed employing British aircraft stationed in France as part of the Advanced Air Striking Force (AASF) in attacks on German infrastructure. The proposal was received with reserve due to doubts about its effectiveness, as well as the risk to civilian populations — an issue highlighted on 1 September by U.S. President Franklin D. Roosevelt.
The British side ultimately decided that the AASF should be preserved until it could have a decisive effect on the course of the war — for example, against a concentration of German reinforcements brought to the Siegfried Line. This cautious approach was criticised by the then First Lord of the Admiralty Winston Churchill, who demanded more intensive action to relieve Poland.
The French "offensive for Poland"
The first, very small-scale actions on German territory were undertaken by French units during the night of 5–6 September 1939. The so-called “offensive for Poland” began at dawn on 9 September.
Formally, the operation was conducted by three armies (3rd, 4th, and 5th) of the 2nd Army Group, but in practice five divisions of the 4th Army took part, because the remaining forces were still concentrating and were able to act only with part of the resources then available. French actions were carried out in accordance with doctrine and the orders received — slowly and methodically. The goal declared by General Gamelin was to draw toward them the maximum possible number of German forces.
In London, however, these actions raised concern that France might prematurely launch a larger-scale operation at a time when British forces were not yet prepared for such action. British strategy was instead to prepare for a long war (according to Chamberlain's expectations — a three-year one), relying on naval blockade and the buildup of air superiority.
These concerns were heightened by the pressure exerted by the French Prime Minister, Édouard Daladier, who — faced with unexpectedly rapid German advances in the East— sought to induce the British ally to undertake more serious measures on behalf of Poland. His emphasis was primarily on deliveries of military equipment, but also, if possible, air operations.
French air forces had already been active since 4 September — though only in reconnaissance flights and fighter operations, without engaging their relatively weak and outdated bomber forces. The transfer to Poland of five French air squadrons, agreed upon during the May talks with the Polish side, ultimately did not take place — formally due to Poland's loss of the airfields intended for their arrival.
Course of the conference
The need to convene a meeting of the Supreme War Council was raised by the British War Cabinet already on 4 September. The meeting was to establish Allied war policy for the coming months. France also recognised the need for such a meeting, though initially it considered holding a broader conference including representatives of Poland.
Ultimately, at British initiative, only a Franco–British meeting took place. Seeking clarification of the situation and concerned by signs that the French might be undertaking overly ambitious operations, British Prime Minister Neville Chamberlain proposed to the French on 11 September that the first meeting of the Council be held the next day, suggesting either Amiens or Abbeville in northern France as the location. The meeting was therefore convened on very short notice, without prior agreement even on an agenda. No Polish representatives were invited (in the view of historian Wojciech Mazur, more likely due to haste and the need for secrecy than out of any deliberate disregard for Poland).
The deliberations began shortly before noon on 12 September 1939. Their principal participants were Daladier, Chamberlain, the British Minister for the Coordination of Defence Lord Chatfield, and General Gamelin, who reported on military matters. Chamberlain, wishing to prevent discussion of any possible offensive, did not bring his own staff officers to France.
Polish affairs — one of the main reasons for the meeting — were addressed at the very start. Daladier confirmed British concerns by stating that the offensive launched on the Western Front was progressing favourably and might in time develop into larger-scale operations. This remark, however, was ignored by Chamberlain, who praised France's restraint, asserting that time was working in favour of the Allies and that premature action would be a mistake.
Realising France's dependence on British support, Daladier immediately withdrew from any “offensive” ambitions. The two prime ministers then approved Gamelin's statement that he did not intend to send his forces against the main German defensive line — and that he had already issued the necessary orders.
Gamelin's declaration effectively meant halting the “offensive for Poland,” which had been underway for only three days. Gamelin had always regarded it primarily as a demonstration of force or a political gesture meant to distract Germany. His decision not to continue the 9 September operation was shaped by the rapid German progress in Poland; he was convinced that the forces engaged there would soon be transferred westward for operations against France.
When Lord Chatfield asked whether he would revise his plans if Polish resistance lasted longer than expected, Gamelin said no — adding that such a scenario would simply give the Allies more time to prepare their own defence against a German attack.
Daladier's attempts to emphasise the importance of efforts to sustain the Polish front — even if only through deliveries of materiel — had little effect in the face of Chamberlain's categorical view that “the only real help for Poland is to win the war” through Allied victory. This did not, however, imply an end to arms shipments to Poland; in fact, most of them were dispatched after 12 September.
During the discussion, it was also agreed that because British industry was vulnerable to air attack, and until its air defences and material reserves were strengthened, more intensive air operations against Germany should be avoided. The Allies also wished to avoid civilian casualties resulting from bombing.
The participants then discussed actions Germany might take after completing operations on the Eastern Front; the threat posed by Italy and the potential for using Italy to benefit the Allies; the likely situation in the Balkans and prospects for opening another front there; Spain's stance; and naval operations, including a possible Baltic campaign. The deliberations were not lengthy: their official portion ended at 1:30 p.m.
In the French provisional version of the protocol, the conclusions were summarised in four points: the main goal of the joint struggle was defined as the overthrow of Hitler's regime; on the Western Front, the principle of proceeding without haste and conserving land and air forces was adopted; it was acknowledged that little could be done for Poland and that the fate of the war would be decided in the West;