Read this paragraph and answer the question that follows:
East of Germany, fighting broke out in a vast area that came to be known as the Eastern Front. Russian troops had mobilized more quickly than the Germans thought possible. Two Russian armies thrust deeply into a region of forests and marshy lakes in eastern Germany. The Germans drove the Russians back. In two battles, the Russians suffered nearly two hundred fifty thousand casualties.
Using context clues in the paragraph, determine the meaning of mobilized
The Germans were hoping for a slow and stretched out organization of the Russian forces as they were a big nation with poor quality railroads and management. However the Russians managed to mobilize, or organize, rather quickly.
