The military plan used by the north to win the civil war?

The Confederate's plan to win the Civil War was defensive. they would stay on their own territory and wait for the Union to get tired of fighing them and surrender. the Union's plan to win the Civil War was to attack. they did go on to Confederate land, but lost many of the battles because theyre general (general McClennan) waasn't aggressive enough, and he evntually got replaced with another general that Lincoln selected. who do you think was right in the Civil War? I'll answer that! the Union of course! slavery was wrong!