What aspect of the war was the greatest cause of casualties? modern weapons trench foot nationalism untrained soldiers

Modern weapons

Explanation:

One of the reasons why World War I had such a high number of casualties was the fact that many modern weapons were developed during these years. These weapons proved extremely lethal, and contributed to the lengthening and the stalemate of the war. Some of these weapons include machine guns, flamethrowers, mortars, modern artillery, poison gas, tanks and submarines.

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.

mickey : )

explanation:

why not?