The main goal of the truman doctrine was to

Counter Soviet geopolitical expansion during the Cold War.

Explanation:

Announced by President Harry S. Truman to the Congress on March 12th, 1947, and continued on July 12th, 1948, the Truman Doctrine was meant to contain threats in Turkey and Greece.

d. japan's attack on pearl harbor

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.