Saturday, July 31, 1943. The Battle of Tioina starts and the Battle of the Ruhr ends.

The U.S. II Corps, under George S. Patton, commenced offensive operations in what would become the Battle of Tioina on Sicily.

Tioina in 1943.

The Battle of the Ruhr, the extensive air campaign over the Ruhr, came to an end.  The last raid was on Remscheid. The bulk of the campaign had been at night, and by the RAF, and it did cause substantial industrial damage to Nazi Germany.

The USS Sheridan was launched.

Today In Wyoming's History: July 31: 1943  The USS Sheridan, APA-51, an attack transport, commissioned.

General Henri Giraud was appointed as commander of French Resistance forces at the first meeting of the National Committee of Liberation.  De Gaulle was named President of the Committee.

Monday, June 28, 1943. The bombing of Cologne.

Today in World War II History—June 28, 1943: Royal Air Force bombs Cologne, Germany, heavily damaging the cathedral and ending the Battle of the Ruhr—total of 872 British bombers have been lost.

From Sarah Sundin's blog.  Other sources would regard the battle as going on through July 31, which is how I would place it.

On this raid, 608 aircraft, including participated of various types, of which 50 were lost. 4,377 Germans, which of course would have been mostly civilians, were killed, about 10,000 injured.  230,000 people were made homeless. Forty-three industrial, six German Army and about 15,000 other buildings were destroyed.

The Germans, on the same day, began construction of rocket launching complexes along the English Channel.  At the Peenemünde Army Research Center, it successfully launched a V2 rocket as Adolf Hitler watched and unsuccessfully launched one which crashed nearby.

The United States Army Air Force changed its aircraft insignia.  It had been:

This insignia had been adopted on May 15, 1942, in order to omit the red ball in the center of the star, which was a feature of the insignia thath predated it. There were fears the red ball could have been mistaken for the Japanese insignia.  A special variant of this insignia had been modified for Operation Torch, which was:

By NiD.29 - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=19785085

Research had since shown that shapes, rather than colors, were more important for aircraft identification, so on this date, the following insignia was adopted:

In the Pacific, the red border was omitted by some units.

Friday, March 5, 1943. Wings.

The Battle of the Ruhr, an Allied air campaign, well let's make this clear, a Western Allied air campaign, against the industrial heart of Germany commenced with a large raid by the RAF on the Krupp munitions factory at Essen.

The campaign would go on into July.

The final German holdout surrendered at Stalingrad.  On the same day, the NKVD shot five German officers it found who were hiding in the city.

The British Gloster Meteor, a jet engined fighter, made its first flight.

The fighter became operational in July 1944 and was the only Allied jet to engage in combat operations during the war.  It was first deployed against V1 flying bombs, an early drone, which made sense given that the V1 was a jet engined aircraft, but late in the war it was deployed on the continent. The RAF largely prevented it from being flown over Germany out of fear that one would be captured and then analyzed by the Germans, or the Soviets.

Frankenstein Meets The Wolf Man was released by MGM