Which of these actions did president lincoln take at the beginning of the civil war? he declared martial law throughout the nation. he imprisoned congressional representatives from the south. he issued a declaration of war without the consent of congress. he used his emergency powers to suspend the writ of habeas corpus.

Using his emergency powers to suspend the writ of habeas corpus was the action that President Lincoln took at the beginning of the Civil War

An Act of Congress, in response to the American Civil war, authorized the Habeas Corpus Suspension Act (1863) which authorized the US President to release political prisoners and suspend the privilege of the writ of habeas corpus.

c. troops marched forward in close formation against newer, more accurate weapons