Operation Astonia
Operation Astonia was the code name for an Allied attack on the German-held Channel port of Le Havre in France, during the Second World War. The city had been declared a Festung by Hitler, to be held to the last man. Fought from 10 to 12 September 1944, the Allied objective was to secure the harbour facilities intact, to deliver supplies to the Allied armies in Continental Europe.
From 26 August, Royal Navy ships and Royal Air Force aircraft carried out a blockade and an extensive preparatory bombardment of the city, which killed over 2,000 civilians and 19 German troops. The land attack was carried out by British infantry, aided by specialist armoured vehicles from the 79th Armoured Division, including Canadian troops. The German garrison of about 11,000 men surrendered on 12 September; the port was badly damaged but it was re-opened on 9 October.
Background
Invasion of Normandy
On D-Day, 6 June 1944, Allied troops landed in Normandy on the north coast of France in Operation Overlord and began the liberation of France. On D-Day, Allied aircraft laid a smoke screen off Le Havre to blind the coastal artillery; a torpedo-boat flotilla and a flotilla of patrol ships sailed from the port, using the smoke for camouflage. The German boats managed to fire 15 torpedoes off the Orne at 05:30, hit and sink and forced several other ships to take evasive action.On 6 July, Allied ships reported an "unusual object" passing through the Trout line, the eastern flank of the invasion area. Fired on, the object launched a torpedo and sailed away. More unusual objects were seen soon afterwards and were also fired on. The devices managed to sink two minesweepers for a loss of nine sunk and fifteen losses from all causes of the 26 that had sailed from Le Havre; it was later found that they were Neger midget submarines of the K-Verband. On the night of 21 Neger left Le Havre and all were sunk, most of their operators being killed, for one British minesweeper sunk and the Polish cruiser ORP Dragon damaged and scuttled off Sword Beach.
June–August
attacked Le Havre in the evening 14 June, twenty-two 617 Squadron Lancaster bombers and Mosquito target markers going first, to drop Tallboy bombs on the E-boat pens and one Tallboy penetrated the roof, which did much to eliminate the E-boat threat. The Dambusters were followed by 228 more Lancasters and three hours later a second wave of 116 aircraft arrived, of bombs hitting the port and anti-aircraft gun positions. The operation was the largest day raid by Bomber Command since the war began.By coincidence, the anti-aircraft guns at Le Havre had been prohibited from firing, to protect Luftwaffe aircraft in the area and the bombers killed about 1,000 marines, demoralised the survivors and destroyed about of shipping, comprising 9 E-boats of the 5th and 9th flotillas which were sunk, two seriously damaged one and slightly damaged, three of the five torpedo boats in port were sunk, along with twenty minesweepers and patrol boats and nineteen tugs; several auxiliary vessels were sunk and eight other vessels were damaged.
Admiral Theodor Krancke, then Chief of Kriegsmarine Group Command West, called the raid a catastrophe and in the war diary wrote "It will be hardly possible to carry out the operations planned...since yesterday's attack on Le Havre". Some E-boats reached Le Havre in mid-June but by the end of July, only six E-boats on the channel coast were operational. The Navy formed the Support Squadron Eastern Flank, a group of small gun-armed vessels, which came inshore during the day to bombard land targets and patrolled offshore at night. The squadron fought many engagements with E-boats and K-Verband; on the night of the Germans sent twenty Linsen sorties, over fifty Marder and several E-boat attacks with new Dackel TIIId circling torpedoes; most of the German craft were sunk. The night sorties by E-boats transferred to Le Havre after D-Day sank a Motor Torpedo Boat, two Landing Ship, Tank, three merchant ships, two landing craft and two tugs; six E-boats were sunk and ten damaged in the exchanges.
''Festung'' Le Havre
Le Havre was the most important of the Channel Ports and second only to Marseille amongst French ports for tonnage capacity, having of quays capable of receiving ocean-going ships. In Operation Maple from early April, British aircraft and ships laid mines off Le Havre and the ports further north, which closed the port for long periods. In early September 1944, German troops of the 15th Army occupied a swathe of coastal territory from the port to Bruges, which had been under attack by the First Canadian Army since the start of September.The port had water on three sides, the Channel to the west, the valley of the Lézarde River to the east and to the south by the estuary of the Seine estuary the Canal de Tancarville. North of Le Havre, the ground rises steeply to high ground as far as the cliffs of Cap de la Hève and the coast to the north. The Lézarde and Fontaine river valleys cut the area into two plateaux, the north plateau being between the rivers and the south plateau to the south and west of the Fontaine, which overlooks the port; inland the south plateau is covered by the Fôret de Montgeon.
The Germans had dug an anti-tank ditch from the Lézarde valley past Montivilliers to the coast at Octeville-sur-Mer, covered by minefields, barbed wire and concrete defensive positions. At the crest of the southern plateau, two fortified positions covered the town and port entrance and the Grand Clos coastal artillery battery could engage approaching ships. The garrison had 115 guns, plenty of machine-guns and mortars ammunition and supplies for 14,000 men for ninety days.
Near Fontaine La Mallet lay Strongpoint 8, with several concrete gun emplacements, the first of a series to cover the northern approaches to the port. The minefields and tank obstacles had been hurriedly built and were superimposed on an earlier and unfinished scheme based on strongpoints. West of Strongpoint 8 the ground is unsuitable for tanks but from the strongpoint to the Lézarde the ground is flat and unobstructed, with a gentle -slope on either side, the plateaux on both sides being at the same height as the strongpoint, which commanded the stream The anti-tank ditch was V-shaped, wide at the top and more than deep but not continuous.
Crossing the Seine
Allied invasion plans required that the First Canadian Army on the left flank of the 21st Army Group should cross the Seine downstream of Rouen and turn left into the Le Havre peninsula to make right-handed flanking manoeuvres to capture Le Havre and its railway connections, Dieppe, Calais and Dunkirk, for the Allied supply effort. On the night of 26/27 August, the crossing of the Seine by the First Canadian Army began and Rouen was captured on 30 August. I Corps improvised means to get over the lower Seine, which was not bridged and II Canadian Corps did the same further upriver. The two corps were ordered to capture Le Havre and Dieppe respectively and then clear the coastal belt up to Bruges.The German 7th Army was ordered to abandon the lower Seine, by 31 August the 15th Army was to hold a line from Dieppe to Neufchâtel; the speed of the Allied advance forced a further German retreat eastwards to the Somme. In Operation Fusillade, Dieppe was entered unopposed by the 2nd Canadian Division on 1 September and the 51st Highland Infantry Division walked into St-Valery, four years after most of the original Highland Division had been forced to surrender there. The Highlanders joined the 49th Infantry Division outside Le Havre on 4 September. As the Canadian Army prepared its attack on Le Havre, the seaward approaches were blockaded closely by the Allies navies from 26 August; the port was the most westerly still in German possession and the Kriegsmarine tried to run supplies in and get out the ships still afloat. During the next four nights convoys departing Le Havre were attacked and a few ships managed to slip away; nine ships were sunk and by 30 August the port was empty.
Prelude
German defences
On 14 August 1944, Colonel Hermann-Eberhard Wildermuth took command of the fortress and later put the effective strength of the garrison at around 8,000 men, from a total of more than 11,000 personnel. Wildermuth had a Festungs Stamm Abteilung elements of the 226th Infantry Division and 245th Infantry Division; a battalion of Security Regiment 5, marines and some naval personnel. About 50,000 French civilians remained in the port from the normal population of about 160,000 people. On 9 September, Wildermuth ordered that infantry attacks were to be resisted, even with pistols but when tanks attacked, strongpoints which had no anti-tank guns could surrender; rather than fight to the last man, the garrison was to resist until the last anti-tank gun.Before the attack, the defenders were given an ultimatum and called upon to surrender; Wildermuth countered by requesting that civilians should be evacuated, given that his orders from Hitler were to hold Festung Le Havre to the last man. According to Wildermuth, many of the civilians were reluctant to leave, even when forced; some Resistance groups opposed evacuation, and there were concerns of a recurrence of the looting that had occurred in 1940. Major E.S. Scott, the 49th Division GS02, who was present at the parley on 3 September, and the division intelligence officer, Major D. R. C. Engleheart, said that Wildermuth refused to surrender or to allow French civilians to pass through his lines. He was given 48 hours to change his mind, but still refused. "Any suggestion, from whatever source," Scott said, "that the British High Command vetoed the evacuation of civilians before the battle is totally without any foundation."