What device is pictured above?

What do historians call the political,social,or cultural circumstances surrounding an event?

How did the russian revolution impact world war i? a) the russians required the allied powers to come to their aid and defeat the radical groups. b) the russians pulled out from the war, enabling the germans to focus on the western front. c) the russians created new technological advancements that were used by the allied powers to win. d) the russians created a new communist government that aligned with the central powers instead.

How do you think sintonis fiancée reacted to receiving this letter?