The Eastern Front was much more terrible, for example, every German officer who would violate discipline in any way, one of the sentences was going to the Eastern Front. In addition, much more human casualties were on the Eastern Front, the way of fighting differed due to the nature of the relief. While the Western Front was mainly taking place in the territory of France and Belgium, although not just there with the trench warfare, the Eastern Front line spanned over a thousand miles, more precisely from the Baltic Sea in the north, to the Black Sea in the south, and extended to parts of the Central Europe, so that the trench warfare was unimaginable.
The answer is: D.
The Code Talkers provided important messages during wartime. Therefore, Transferring secret information about military strategies before an important battle is the achievement that would most likely have been made by the Code Talkers.
To combat the creation of NATO, the USSR (AKA Russia and multiple other nations) banded together with its communist counterparts and signed a pact in Warsaw, hence the alliance's name, "Warsaw Pact."
Under the leadership of Russian communist revolutionary Vladimir Lenin, the Bolshevik Party seized power in the Russian Republic during a coup known as the October Revolution.