Invasion? Are you serious? Uh, I believe almost all of the War of Northern Agression was fought in Southern soil.
there was no war on women and children
Such was General Sherman's stated aim! As a resident of the state of Georgia, I can assure you that there was, indeed, a very harsh war waged on women and children, and have read hundreds of letters of the era detailing the devastation wrought on farms and families, of Union soldiers picking clean the fields and barns and livestock everywhere they went like a plague of locusts, of the women who hid loaves of bead in baby carriages just to survive, or to attemot to survive. As for cities, the South was a largely rural society, but of course the cities were defended. People lived there! Homes burned down in cities are still homes. Other than Savannah, most cities were simply torched. Shall I bring up the slave women of Columbia whom the Union soldiers infamously raped? And the economic devastation on the entire population of the South, yes, women and children included, was to last for generations. Lincoln's war on his own people is one of the greeat travesties in the history of mankind.
Donmaeker has drank the reconstructed history(fairy tale) kool-aid of the US Civil War.
Antietam, Gettysburg were the end of two invasions of northern states by the pretended army of northern virginia. Vermont, and Arizona Territory were also invaded. Throw in the frequent invasions of Missouri and Kansas and you have well over 50 invasions of northern states.
The war started with threats by the insurrection against US forts all across the US, to include Texas. The soldiers in all but Ft Sumter and Ft Pickens handed their forts over. Major Anderson had previously abandoned Ft. Moultrie to avoid bloodshed. Ft. Pickens was held by the US throughout the war.
Aside from that, there was no southern soil. It was all the United States. It is still all the United States. The insurrection was illegal, and immoral (but not fattening).