Privateer176 on Apr 22, 2016 wrote:

When we encounter the Armada why do the soldiers have different color schemes?

In game, it's probably due to being different types of Armada soldiers, or different levels.

But, historically (and currently) colour was an easily used method of indicating different rank, regiment, country, or element. Generally each regiment would have it's own chosen colours that, while maybe not shown in the uniform, would be present in the regimental flags, dress uniforms, and flashes (coloured badges worn on the shoulder/sleeve/collar). However, coloured uniforms also indicated what part of the military the soldier belonged to. For example, using the British Army of the 1800's, the average solder wore a red jacket, (what most people would think of as a historical British soldier), But, the English rangers wore green jackets, the artillery (or bombardier) wore black or dark blue.

This carries on even into (most) modern day militaries. Example, the Canadian Armed Forces (CAF), for us the colour differences are most notable with our berets, Army wears a green beret (that's right all CAF army are green berets), Navy wears a black beret, Airforce wears a blue beret (me!), military police wear red berets, and our secret squirrelies wear brown berets.

So, it's very common for militaries of any age to use different colour schemes to identify a job, rank, regiment, etc.

Privateer176 on Apr 22, 2016 wrote:

When we encounter the Armada why do the soldiers have different color schemes?

Different jobs for different troops like some for being patrol guards and other troops for the front lines, etc...