I have a pair of the black corcoran combat boots on amazon, and i noticed that is has this big seam running down the back and to what i understand that is called a "back seam" and that is keeps the boot uppers together.         http://www.neimanmarcus.com/p/Chloe-Back-Seam-Pull-On-Boot-Boots/prod144600079/   http://www.amazon.com/Corcoran-Mens-10-Inch-Plain-Sole/dp/B002CWBE4U       My main question is, even in WW2 boot's there were made with more or...