What caused the battle of antietam to be the single bloodiest day in american history? a. confederate troops unexpectedly used guerilla tactics b. confederate troops outnumbered union troops 2 to 1 c. troops marched forward in close formation against newer, more accurate weapons

c. troops marched forward in close formation against newer, more accurate weapons

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.

soviet influence spread across eastern europe sharply during and after wwii. the soviet armies liberated the countries in eastern europe and occupied them from the germans as they were forced to retreat towards germany.