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The technology most changed the people on the home front understood the civil war was Telegraph.The Sojourner truth role in a civil war was to ensure the freedom of others.The ways that African Americans helped for the union during the civil war is to serve. They served as a cook, guards and carpenter etc.

Explanation:

Telegraph was the technology that most of the people changed on the home front understood the civil war. The telegraph was invented by Samuel Morse. The telegraph is mainly  used for military purpose.Freedom to others was the role of Sojourner truth. Sojourner is an American and African who fought for the slave rights and women rights.African Americans helped in many ways. Some of the ways are that African Americans helped for the union during the civil war is to serve. They served as a cook, guards and carpenter etc.

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