In my book series, the Aurean Empire has a very organized and professional standing military, heavily influenced by the Roman and Eastern Roman Empires, in which weapons and armor between soldiers is very standardized and provided by the state.
However, unlike either of those two Empires, the Aurean Empire is home to a number of sentient species, many with very different sizes, anatomy, and overall builds than normal humans. Here is a list:
-Humans (no elaboration needed)
-Guants (Basically humans but with green skin, blue hair, and Mediterranean features, often just considered another race of humans).
-Satyrs (Humans, but with the legs of a goat and small, straight horns sprouting from their scalp).
-Minotaurs (The body of an absolutely jacked human, with the head, legs, and tail of a bull or cow depending on sex. Average height for males is around 6'10" and for women is 6'4").
-Tangolians (Anthropomorphic golden eagles with roughly human proportions, and their wings are pretty much just feathered arms so no flight. Their faces are by far their most animal-like feature, being just a bigger eagle's head).
-Zebus (See Tangolians, but are anthropomorphic zebras and quaggas instead of golden eagles and don't have feathered arms. They do have hooves, though).
-Merpeople (Basically just humans with blue-tinted hair while they're on land, but when underwater their legs turn into fish tails, they get gills, and their eyes glow blue).
-Seraphim (Basically just the common depiction of angels but their flight ability is severely limited - they can only hover about a foot off the ground).
How would the Aurean Military standardize equipment and weapons for such a species-diverse planet without essentially segregating the army by species?