| Unit Name: | No. 315 (City of Dęblin) Polish Fighter Squadron |
| Dates: | 21 January 1941 – 14 January 1947 |
| Country: | United Kingdom |
| Allegiance: |  Polish government in exile |
| Branch: | Royal Air Force |
| Role: | Fighter Squadron |
| Command Structure: | RAF Fighter Command |
| Nickname: | Deblin Dywizjon Myśliwski "Dębliński" |
| Notable Commanders: | Eugeniusz Horbaczewski |
| Identification Symbol Label: | Squadron Badge heraldry |
| Identification Symbol 2: | PK (January – July 1941) SZ (July 1941 – January 1946) |
| Identification Symbol 2 Label: | Squadron Codes |
No. 315 (City of Dęblin) Polish Fighter Squadron (Polish: 315 Dywizjon Myśliwski "Dębliński") was a Polish fighter squadron formed in Great Britain as part of an agreement between the Polish Government in Exile and the United Kingdom in 1941. It was one of 15 squadrons of the Polish Air Force in exile that served alongside the Royal Air Force (RAF) in World War II.[1] It was named after the city of Dęblin, where the main Polish Air Force Academy has been since 1927.
The squadron was formed at RAF Acklington, England, on 21 January 1941. The squadron, equipped with Hurricanes, was moved in March to RAF Speke, Liverpool, where it made frequent patrols over naval convoys as part of No. 9 Group RAF. Before July, when it came under Polish command. No 315 was commanded by Squadron Leader H. D. Cooke.
In July it was moved to RAF Northolt, West London, re-equipped with Spitfires and began to conduct offensive fighter sweeps over occupied Europe. During two operations over France, on 9 August, the squadron achieved its first aircraft claims—two Bf 109s destroyed, three probables and three damaged. The squadron returned to Lancashire in April 1942, located at RAF Woodvale, Sefton. The squadron returned to Northolt in September and resumed operations over France. In June 1943, the squadron was withdrawn to Yorkshire, then to County Down, Northern Ireland in July.
Having returned to England in November, the squadron moved to the south west in April 1944, where it joined No. 133 Wing RAF of the 2nd Tactical Air Force. The squadron was re-equipped with the Mustang Mk III, which the squadron used for the remainder of the war. The squadron formed part of southern England's defence against the V-1 flying bombs and served in the Battle of Normandy.
During a sweep over France on 18 August, 12 Mustangs of No. 315 engaged 60 German fighters of JG2 and JG26, which was in the process of taking off and landing near Beauvais, France. In the ensuing battle, the squadron was credited with 16 victories, 1 probable and 3 damaged for the loss of one pilot, Squadron Leader Eugeniusz Horbaczewski. Conversely, German claims were that 12 aircraft had been lost and that they had themselves shot down 6 aircraft (one of which was claimed to be a Lockheed P-38 Lightning).
The squadron later carried out operations over Germany, Norway and the Netherlands, where the squadron carried out sorties until the end of the war. The squadron claimed 86.33 confirmed victories, 18 probable and 26 damaged. After the war, 315 Squadron remained part of RAF Fighter Command until it was disbanded on 14 January 1947.
| To | Name | Remark | |
|---|---|---|---|
| Jan 1941 | Jun 1941 | S/Ldr. H.D. Cooke | British Officer |
| Jun 1941 | Sep 1941 | Maj. Stanisław Pietraszkiewicz | |
| Sep 1941 | Nov 1941 | Kpt. Władysław Szczęśniewski | |
| Nov 1941 | May 1942 | Maj. Stefan Janus, VM, DFC | |
| May 1942 | Oct 1942 | Maj. Mieczysław Wiórkiewicz | |
| Oct 1942 | Apr 1943 | Kpt. Tadeusz Sawicz | |
| Apr 1943 | Feb 1944 | Kpt. Jerzy Popławski, DFC | |
| Feb 1944 | Aug 1944 | Kpt. Eugeniusz Horbaczewski, DSO | |
| Aug 1944 | Apr 1945 | Kpt. Tadeusz Andersz | |
| Apr 1945 | Feb 1946 | Kpt. Władysław Potocki | |
| Feb 1946 | Dec 1946 | Kpt. Janusz Siekierski | |
| Jan 1947 | Jan 1947 | Tadeusz Tamowicz |
| To | Aircraft | Version | ||
|---|---|---|---|---|
| February 1941 | July 1941 | Hawker Hurricane | Mk.I | |
| July 1941 | August 1941 | Supermarine Spitfire | Mk.IIa | |
| August 1941 | November 1942 | Supermarine Spitfire | Mk.Vb | |
| November 1942 | June 1943 | Supermarine Spitfire | Mk.IX | |
| February 1943 | March 1944 | Supermarine Spitfire | Mk. Vb LF.Vc | |
| March 1944 | December 1946 | North American Mustang | Mk.III |