The Emancipation Proclamation was not a battle but is considered as one of the most important events why?

The Emancipation Proclamation led the way to total abolition of slavery in the United States. With the Emancipation Proclamation, the aim of the war changed to include the freeing of slaves in addition to preserving the Union.

Explanation:

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.