Describe the Persian war

Explanation:The Persian Wars refers to the conflict between Greece and Persia in the 5th century BCE which involved two invasions by the latter in 490 and 480 BCE. Several of the most famous and significant battles in history were fought during the Wars, these were at Marathon, Thermopylae, Salamis, and Plataea, all of which would become legendary. The Greeks were, ultimately, victorious and their civilization preserved. If they had been defeated then the western world may not have inherited from them such lasting cultural contributions as democracy

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.

i'd assume india mainly because of how isolated japan was.   plus it is a whole china away.