From here:

Most commonly, the line referring to the commitment of soldiers in the Civil War "As he died to make men holy, let us die to make men free" has been changed to "As he died to make men holy, let us live to make men free."

In this example, some hymnals use a verse from Howe's original manuscript which was not in the first published version. The word "sucour" has been changed to "honor" in a verse from her original. The "soul of Time" has been changed to "soul of wrong." Pronouns used for God have been capitalized.

Later version:

He is coming like the glory of the morning on the wave,
He is wisdom to the mighty, He is honor to the brave;
So the world shall be His footstool, and the soul of wrong His slave,
Our God is marching on.

As first written:

He is coming like the glory of the morning on the wave,
He is wisdom to the mighty, he is sucour to the brave,
So the world shall be his footstool, and the soul of Time his slave,
Our God is marching on.