Not anymore. The last uniform in which a commissioned officer wore rank on their collar was the Battle Dress Uniform/Desert Combat Uniform, which has since been replaced by the Army Combat Uniform, where the rank in worn on a flap on the front of the shirt.
An officer in the United States Army who wears a silver eagle is typically a Colonel, which is a rank above Lieutenant Colonel and below Brigadier General. The silver eagle is worn on their collar insignia denoting their rank.
Schultzstaffel commonly referred to as SS due to the Sig runes worn on the collar, but they were also identified by the sleeve eagle on their left arm instead of the breast eagle that was worn on the right chest by the Wehrmacht.
A cravat is worn inside a shirt collar.
be worn open
You didn't say what branch but usually the collar on Cammies same place as enlisted or towards the end of a shirt jacket epaulet same as on a dress uniform. There are uniform specs for each branch that say where exactly on collar insignia is to be worn. Like 3/4" back from front, 1/2" up from bottom, etc.
A full bird Colonel. A silver oak leaf would be a Light Colonel (Lieutenant Colonel). A gold oak leaf is a Major.
Aegis
Blue Collar
A vicar's garment is typically called a clerical collar or a clergy collar. It is a special type of collar worn by clergy members as a symbol of their religious profession.
For PVT to SPC the gold rank is worn on the collar. For SGT and above the rank is worn on the shoulder boards.
A vicar's neckband is commonly referred to as a "clerical collar" or "Roman collar." This distinctive white collar is often worn by clergy as a symbol of their religious vocation and commitment. It can be made of various materials and is typically worn with a black shirt or clerical attire.
A vicar's neckband is commonly referred to as a "clerical collar" or "Roman collar." This distinctive white collar is worn by clergy members as part of their ecclesiastical attire, symbolizing their religious role and commitment. It is typically worn over a collarless shirt or a clergy shirt.