USA HISTORY

It was at first impossible for anyone to realize what had actually happened. The smoke and fumes hid everything from sight, and hundreds of men were thrown into a comatose or dying condition, and within an hour the whole position had to be abandoned, together with about fifty guns. -British Field Marshal Sir John French, report on the second battle of Ypres, 1915What caused the scene described in this excerpt

(A) ** A poison gas attack on soldiers in the trenches

(B) A tank attacking soldiers on a battlefield

(C) An aerial bombing of an infantry unit

(D) A submarine attacking a docked ship

Concept note-1: -In 1915, the Germans used poison gases against the Allies fighting in the trenches on the Western Front. To protect soldiers from chemical warfare, gas masks were developed. Great Britain made one of the first types of masks capable of minimizing the deadly impact of these gases on their troops.

Concept note-2: -The “Era of Good Feeling” refers to a period in U.S. history from about 1815 until about 1825, characterized by a sense of optimism and positivity.

Concept note-3: -More than a century ago, the opening of the Panama Canal revolutionized international trade by making it much quicker and easier to travel between the Atlantic and Pacific Oceans.