Which two factors played an important role in stopping napoleon from conquering russia?

1. Russia always has harsh winters, in this case Napoleons army wa snot ready for such inconvenience. They froze, starved, and some eventually died.

2. Russia had a scorched earth policy, in which they burned crops, farms, and supplies. They abandoned cities, such as the capital, and left everything empty for the French. As the French arrived there was no one in the cities, but there was also nothing the French could use for their advantage. After some time, the French ran out of supplies and food, and to make it even worse, this was the time of the harsh winters. The French army was weak and was unable to fight back the Russian army which attacked the weakened army afterwards, and made them flee all the way back to France.

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.

an era of negotiation.

is that an answer to your question?