What I learned during a movie in humanity

In humanity we watched a movie about the Ancient Rome.
First of all people in Ancient Rome wore cloth like really light, such things like they wore cloth and pants made by animal's skin, and armor which cover their higher side of our body. Soilders wore a cloth and pants and a helmet made by a steal. Normal people wore armor and pants. However people like higher level such as king, they wore cloth with a great materials and helmets. I am curious that why do higher level people wore a helmet ? This is just guessing about the thing, but I think it's the symbol of people who could ride a horse, like we can know that how horses are important and hard to get horses. One example is when there are a war many soilders don't ride a horse, but higher level of soilder ride a horse.
I found one more thing that some soilders wore a silver color of armor and some soilders wore a gold color of armor, but people who wore the silver color of armor were more than gold color of armor, through that we can know higher level of people wore a gold color of armor and lower and normal people wore a silver color of armor.
Jews wore cloth which are really light and thin, so they could get hurt easily. Higher level of jews could have a slaves, but lower can't.

These things are what I learned through the movie in Humanity class.
Some sources from Juegan, we talked about the movie together !!