Complex sentence: Carson died at Fort Lyon, Colorado, of an aortic aneurysm on May 23,1868, five years before the Evans Repeater was invented Testimonials like this were great advertising and highly sought after by all the arms companies.
Split into simpler sentences: Carson died at Fort Lyon, Colorado, of an aortic aneurysm on May 23,1868, five years before the Evans Repeater was invented. Nevertheless, testimonials like this were great advertising and highly sought after by all the arms companies.