[hider=Secret Information]
I hate using reference pictures that I myself didn't draw, but it would take days to draw all of this out on my own. So I'm going to use filler images for now.[/hider]

[b]Machine Soldiers:[/b]

Machine soldiers are the majority of Human military now, having fully phased out Avians by being physically superior in every aspect. They do not tire, they do not complain, they're more accurate, they cannot feel fear, and best of all, they don't age. 

There are a dozen or so varieties of Machine Soldier. Some aren't even Soldiers at this point, but I'll list the most important varieties.

First and foremost are Humans in mechanical suits, now, while these are not truly machine soldiers. They make up about one third of the sum total military force of the world. The suits they wear enhance their natural abilities exponentially. Able to lift and haul 10 tons of equipment on their shoulders with ease. Their reflexes are augmented with onboard AI that give them a steady stream of information in an advanced HUD. These AI are customized both personality-wise and appearance-wise by the soldiers inside. There are two speed settings in these suits. There is the long distance running speed and the sprinting speed. Which are 60mph and 120mph respectively. Their outfits are resistant to temperatures up to 500 degrees fahrenheit, low caliber bullets, and completely immune to falling injuries.

Appearance: 
[img=http://media-cache-ak0.pinimg.com/236x/c3/ba/15/c3ba15a1b7aecc82e8dc6827810f05cf.jpg]

Second are genuine Machine Men, these are advanced supersoldiers made from metal and anger. There are very few Avians that can compare to them in raw ability. They can run at 200 mph, steady pace and 250 when in chase. They can lift up to 50 tons over their head and haul it for miles without any negative effets. Their jump height is 50 feet vertically, and they can leap up to 100 feet horizontally. They are made of a sturdy metal that is carbonado infused cobalt titanium alloy. This alloy is resiliant and able to take hits from modern tank cannons. 

Appearance: 
[img=http://news.toyark.com/wp-content/uploads/sites/4/2013/03/Total-Recall-Synthetic-Statue-006.jpg] 

Third are the colloquially refered Chasers, chasers are aggressive and fast. Although not very sturdy. They can run faster than most Avians at 300mph, they move so fast that the human eye cannot actually pick them up before they have gotten to them. They have claws made from ceramic that dig deeply into flesh and break off, they are armed with five on each limb and three refills for each claw. Once a claw breaks, the new claw slides forward into place.

Appearance: 
[img=http://thumbs.dreamstime.com/x/3d-wild-hunter-cyber-panther-15700115.jpg]

Fourth are the arguably most dangerous of the bunch. The walker tanks. As the name implies, they are literally walking tanks. These machines weigh upwards of 14 tons and are made out of boron steel, they can stomp their enemies to death or unleash hell with twin cannons. These are the toughest of tough, a single walker tank can fight toe to toe with an S-Rank for a short period of time. 

Appearance:
[img=https://treehouse-uploads.s3.amazonaws.com/production/profile-photos/586812/Mech.jpg]

Fifth are known as skimmers, they're small circular things that fly about and take photographs of everything. They play a live stream directly to their lauch unit, usually a Walker Tank or Chaser. If one finds you, you'd better run, because a group of Machine Soldiers are certainly going to follow.

The final unit are large airships for pickup and dropoff of machines and captured Avians. They can fly at hyper sonic speeds, capable of hovering and manouvering horizontally and vertically. They're armed with a full battery of missiles, bombs, side/wing/rear/top/front mounted chain guns with 360 degree rotation. They carry enough ammunition for these chainguns to fire non-stop for a half hour at 10,000 rounds per minute. For a sense of scale, they can carry around 8 Walker Tanks and 40 Machine Men at the same time.

[img=http://www.conceptart.org/forums/attachment.php?attachmentid=1755499&d=1364685503]