That river rich in history is the Euphrates River. The Tigris River and Euphrates River gave the ancient name "Mesopotamia" ("Land between the Rivers") to a region that was an ancient cradle of civilization. The lengthy Euphrates River originates in eastern Turkey, flows through Syria and Iraq, and then joins the Tigris River in the "Shatt al-Arab" ("River of the Arabs") which flows out into the Persian Gulf.
The answer is C. Main, Militarism, Alliances, Imperialism, and Nationalism.
Basically, no soldier was allowed to tell his family where he was being deployed to because a spy or something similar could be listening which could lead to the opposing side getting that information and attacking the ship/base etc. Hope this helps!<span />
In 1894, Chekhov began writing his play The Seagull in a lodge he had built in the orchard at Melikhovo.
Hope that helps some.