In my novel there are a number of squadrons, named 'A' Squadron, 'B' Squadron and so on. My question is, how should these names be punctuated? Is it correct to use inverted commas around the letter (as above) or should I just leave it as A Squadron, or is there another way? In a similar way, there are also different troops, named 'one' troop, 'two' troop, etc. How should these be punctuated? Many thanks.