Endworld is a series of post-apocalyptic novels written by David L. Robbins.
[1] David Robbins also wrote a 13 novel spin-off to this series called Blade.
The series revolves around the predecessors of The Family, a survivalist group living in an isolated compound, called The Home, located in north-western Minnesota and their attempts to venture outside their secure home for the first time since the war.
The United States itself was ravaged by nuclear, biological and chemical weapons and has become a dangerous place.
In the novels, the Family's protectors, known as the Warriors, travel to cities and territories, usually dealing with some sort of threat to The Home such as dictators, mutants, etc.