<span>American troops helped turn the tide of the war. Once Russia dropped out of the war in 1917 because of the Bolshevik Revolution, the Germans were able to push all of their soldiers from the Eastern Front to the exhausted Western Front where they faced decimated French and British troops. However, the timely arrival of the American Expeditionary Force under the leadership of John J. Pershing, the Allies, including America, were able to turn the tide and push the Germans back from the Western Front.</span>
Generally speaking, advanced farming techniques allowed for a surplus of food, which led to the emergence of a "artisan" class--since for the first time people were "freed" to engage in other actives besides gathering food.
Sheep! In New Zealand there are around 3 million people & 60 million sheep
Answer:
Well based on the fact that the very first patented rock crushing machine was made in the year 1830, and the first successful, Eli Whitney Blake's, was in 1858, I'd say the development process was around 30 years.
