It's an interesting thing to note that the VDF (Valley Defense Force, the primary leaf-eater army) is Communism at it's best ideologically, where every race is assigned a place within society and nobody is left behind.
Claw on the other hand (the Sharptooth faction) is Capitialism at it's worst, where it is a sharptooth-eat-sharptooth world and only the strong survive to prosper. Claw will use the most hienous and horrible weapons in battle as long as it means they win in the end, and often it's soldiers are in it purely to be fed from day to day.
Very interesting point Caustizer, but I'm afraid that I might have to disagree with you. Your observation is very good, and the government/economic systems of Claw and VDF should be noted, but I have to argue against your idea.
First, communism should not be compared to capitalism, as communism is a government system while capitalism is a market system.
Secondly, no military in the world (that I know of) is operated according to communist principles. Since true communism is classless, a military operating according to communist principles would have no rank, which means no command. There is no military (that I know of) that has no command structure. Also, communism is built on the principle of total democracy, where everyone votes on what to produce and what to do. I do not know of any military that allows soldiers to vote directly on which city to attack, etc. Also, true communism has no government, but the Great Valley definitely has leaders and representatives. Although I do agree with the fact that the VDF is definitely not entirely capitalist, I disagree with the idea that the VDF is socialist.
Thirdly, from a global perspective, all nations, including Claw and VDF, can be considered capitalist. All nations try to lower the prices of the goods they produce and wipe out their competitors. So in a sense, all nations are capitalist. Also, in a true capitalism is based on competition, which I do not see in the Claw faction. Claw is the supreme leader, and he has no equals. There is no one to compete with him, so Claw's faction is not capitalist. Although I'm not sure exactly how Claw is operated, I like to believe that Claw is a dictator who assigns everyone careers and makes most of the population join the army. Thus, Claw, in my humble opinion, should be compared to a totalitarian dictatorship/oligarchy.
Now, the rule of government should not be downplayed in your story. That will add a lot of philosophy and meaning into your story and hopefully <_< prevent the usual criticism of war fanfics from being targeted at your story. However, I see the conflict between the VDF and Claw as a Republic vs. Dictatorship/Oilgarchy conflict, not a communism vs. capitalism conflict. Nonetheless, Caustizer, you made a very good point, and the above are just my opinions.
(p.s. I'm having some trouble comming up with warships for Claw. Do you want just one major capital warships surrounded by meat-shield fodder, or do you want to make it more like the VDF fleet? Also, who do you want the Claw ships to be manned by? Bellydraggers or swimming sharpteeth?)