The rank is placed on a single rank slide on the front of the breast. The unit insignia is placed on the right arm and is called a Tactical Recognition Flash (TRF)
Depends on your rank and the uniform. On the Class A uniform and dress blues, enlisted personnel wear fabric insignia on the sleeves, whereas officers wear pin-on insignia on the epaulets. On the Class B uniform, Private (E2), Private First Class (E3), and Specialist (E4) would wear metallic insignia pinned through the collar, whereas Corporal and higher would wear shoulder boards on the epaulets. On the older Battle Dress Uniforms (BDUs) and Desert Combat Uniform (DCU), rank insignia would be worn on the collar points. On the current Army Combat Uniform (ACU), it is worn on a velcro tab on the front of the uniform. Officers and Warrant Officers wear their rank insignia on the beret, whereas enlisted personnel wear their regimental crest. Rank insignia is usually sewn onto helmet covers - however, this is often a moot point, as the placement of the rank insignia on the kevlar helmet often leaves it covered by the mounting plates for night vision goggles.
The insignia of Marines is a complicated process and not the same for every uniform. The best way to find out is to check the Marine Corps Uniform Regs.
The uniform worn by Lord Nelson Rathbone was that of a cavalry officer of the British Army, with heavy cavalry Sabre being the sword he used. He also wore the insignia of a Knight Commander of the Royal Victorian Order ...
It's a golden Eagle/Globe and Anchor.
Three chevrons, with the points facing down. See related link at the bottom. On their fatigue uniforms I saw them wearing in Afghanistan and Iraq, there would be a tab at the front of their blouse. The rank insignia would be embroidered on a loop, and this tab would be run through that loop. The actual rank insignia used by the Australians is more the same of those used by the British and other Commonwealth Dominion forces - there may be slight variations (such as the Canadian rank insignia, which has the rank of Master Corporal, and incorporates the Canadian maple leaf into the insignia), but the structure follows the British example, and the crown is an ever present feature on the insignia badges of certain ranks, military unit insignia, etc. (note: this only applies to the actual Commonwealth Dominions/Realms, who acknowledge the British monarch as head of state. Not all countries who are members of the Commonwealth of Nations are Commonwealth Dominions, and the crown is absent from their insignia).
The rank of Sargeant has the insignia of three downward-pointing chevrons.
I believe it's found on the uniform beret. See the Wiki for British SAS uniform.
The placement of specific patches on a USMC military uniform may vary depending on the individual's rank, unit, and the specific regulations in place. However, generally speaking, patches such as the U.S. Marine Corps emblem (Eagle, Globe, and Anchor) are typically worn on the upper left chest, while unit patches and skill badges may be worn on the sleeves or shoulders. The exact placement and configuration should be in accordance with Marine Corps Uniform Regulations.
The colours of German and British uniform were grey and khaki respectively
By the rank insignia on their uniform. Three stripes is the norm, but it can vary throughout different military forces.
Because traditionally their uniform buttons, badges of rank and insignia were made from brass.
Yes, they do, except for the Army Combat Uniform, which does not have epaulets.