Why were soldiers on both sides afraid of poisonous gas?
a. the gas attack was silent and and they could die within seconds if the gas was inhaled.
b. when the gas was mixed with artillery fire and it spread for miles. i ruled the other two out.

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.