US Army Air Forces 
These patches are the general version of Air Force patches worn by US soldiers during World War Two. Sometimes branch specific archers were worn above these USAAF patches.

The insignia is a blue circle with a white star with a red dot and above the star are yellow wings.

USAAF Armament Specialist 

These patches were worn by US Air Force members who were trained in a specific skill. In this case Armament of aircraft.

The insignia is a blue triangle with in the middle a yellow bomb to specify armament.

USAAF Photography Specialist 

These patches were worn by US Air Force members who were trained in a specific skill. In this case (aerial) photography.

The insignia is a blue triangle with in the middle a yellow camera to specify photography.

USAAF Engineering Specialist 

These patches were worn by US Air Force members who were trained in a specific skill. In this case engineering/technicalities.

The insignia is a blue triangle with in the middle a yellow aircraft engine to specify engineering.

USAAF Weather Specialist 

These patches were worn by US Air Force members who were trained in a specific skill. In this case weather patterns.

The insignia is a blue triangle with in the middle a yellow bomb to specify armament.

USAAF Communications Specialist 

These patches were worn by US Air Force members who were trained in a specific skill. In this case communication skills.

The insignia is a blue triangle with in the middle a yellow radio tower to specify communications.

USAAF Strategic Air Command Tab

These patches were worn by US Air Force members who were part of a specific branch. Since there was no specific patch for this branch these arches were worn above a standard USAAF patch.

The insignia is a blue arch with yellow letters specifying the USAAF Branch.

USAAF Training Command Tab

These patches were worn by US Air Force members who were part of a specific branch. Since there was no specific patch for this branch these arches were worn above a standard USAAF patch.

The insignia is a blue arch with yellow letters specifying the USAAF Branch.

USAAF Air Technical Service Command Tab

These patches were worn by US Air Force members who were part of a specific branch. Since there was no specific patch for this branch these arches were worn above a standard USAAF patch.

The insignia is a blue arch with yellow letters specifying the USAAF Branch.

USAAF Air Defense Command Tab

These patches were worn by US Air Force members who were part of a specific branch. Since there was no specific patch for this branch these arches were worn above a standard USAAF patch.

The insignia is a blue arch with yellow letters specifying the USAAF Branch.

USAAF Support Command Tab

These patches were worn by US Air Force members who were part of a specific branch. Since there was no specific patch for this branch these arches were worn above a standard USAAF patch.

The insignia is a blue arch with yellow letters specifying the USAAF Branch.

USAAF Air Materiel Command Tab

These patches were worn by US Air Force members who were part of a specific branch. Since there was no specific patch for this branch these arches were worn above a standard USAAF patch.

The insignia is a blue arch with yellow letters specifying the USAAF Branch.

USAAF Air Transport Command Tab

These patches were worn by US Air Force members who were part of a specific branch. Since there was no specific patch for this branch these arches were worn above a standard USAAF patch.

The insignia is a blue arch with yellow letters specifying the USAAF Branch.

USAAF Proving Ground Command Tab

These patches were worn by US Air Force members who were part of a specific branch. Since there was no specific patch for this branch these arches were worn above a standard USAAF patch.

The insignia is a blue arch with yellow letters specifying the USAAF Branch.

USAAF Cadet 

These insignia were worn bu US Army Air Force soldiers that were training to be pilots during World War Two. The difference between black and blue patches isn't 100% clear. It's either that black Cadet patches were worn until 1943, then the blue backed version was introduced and worn since, or that black was for more basis cadets and blue was for more advanced cadets.

The insignia is a black or blue background with a winged propeller in the middle.

USAAF Air R.O.T.C. Command

R.O.T.C. stands for Reserve Officers Training Corps. The USAAF ROTC was responsible for training and providing officers to the US Army Air Force during World War Two.

The commands patch is the typical blue patch with USAAF star with wings but instead of a loose tab the tab is included in the patch. Above the USAAF star is AIR R.O.T.C. in yellow letters.

USAAF Mediterranean Allied Air Force

Members of the MAAF were responsible for providing Air power/support in the Mediterranean region during World War Two.

The insignia is a blue bar with in the middle white wings. Under the wings are blue waves with MAAF, standing for Mediterranean Allied Air Force.

USAAF Strategic Air Forces Europe

Members of the USSTAF were responsible for providing Air power/support in the West and Northern European region during World War Two.

The divisions insignia is a blue/white/red shield shape with the typical USAAF star with wings on top. Under the star are the letters USSTAF, standing for US Strategic Air Forces. 

USAAF Pacific Air Command

Members of the Pacific Air Command were responsible for providing Air power/support in the Pacific region during World War Two.

The divisions insignia is a blue diamond shape with the typical USAAF star with yellow wings in the middle. Under the star are 5 white stars and above is an aircraft engine in yellow.

USAAF 9th Engineer Command

The 9th Engineer Command was responsible for building and maintaining Allied Airfields in England and mainland Europe during World War Two.

The commands insignia is a blue shield shape with the USAAF white star with yellow wings on the bottom. In between the wings is the Engineer Command insignia with above the Roman IX for 9.

USAAF Alaskan Air Command

Members of the Alaskan Air Command were responsible for providing Air power/support in the Alaskan region during World War Two.

The commands insignia is a blue shield shape with the USAAF white star with a single yellow wing. Under the wing are 7 smaller yellow stars.

USAAF Air Transport Command Patch

The USAAF Air Transport Command was responsible for materiel, personal and supplies to be flown into war zones. The transport command made sure that the Air Forces were well supplied. These Air Force members did not participate in combat supply missions.

The insignia used was a grayish, silver or gold round patch with a red and blue clock like figure on top of a globe.

USAAF Air Force University Patch

This particular patch was worn by members of the Air Force University. The Air Force University was responsible for the Air Force Training program during World War Two.

The insignia is a blue round patch with in the middle the letters AU with yellow wings and a star. Above the letters is a yellow genie lamp.

USAAF ATSCE Patch

ATSCE stands for: Air Technical Service Command Europe. The ATSCE Air Force personnel were responsible for maintaining US Air Force materiel and provided Technical support were needed.

The insignia is a blue round patch with at the bottom the USAAF white star with yellow wings. On top of the star is an engineering logo with the letters ATSCE.

USAAF Woman Air Force Service Pilots

The WASP were sometimes referred to as Women Auxiliary Service Pilots or Women Army Service Pilots.

The WASP was a civilian organisation, active during World War Two. Members of WASP became trained pilots who tested aircraft, ferried aircraft and trained other pilots.

The insignia of the WASP is a blue round patch with in the middle a woman with wings and pilot googles with a pilots cap.