The "Big Three" countries were the United States, Great Britain and Russia. They were called this because they were by far the most important allied players during the war, with Russia and Britain taking on most of the casualties.
<span>The US is a mixed economy, with mostly free market features. There are some command economy features, such as a public military, public police forces, public roads, etc</span>
Harsh and extremely cold winter was the main geographical factor that added to German losses at Stalingrad.
Russia is well-known for its cold winters and many people from Western Europe even nowadays complain about severe weather conditions while visiting this country. Thus, this is not surprising, that cold weather became a serious obstacle on the way of Germans.
I have a feeling legislative.