Frontline Fugitives, Book 1,2,3 and 4

Acclaimed author Nick Jacobellis, has all these titles available at Amazon, including all of his other exciting adventure novels.
Frontline Fugitives is an incredible 4 book series that begins during WWI and follows it's characters to the end of WWII. It's the story of an African American NYC Police detective who finds himself tracking several bank robbers that killed a fellow NYC Police officer from the streets of NYC into the killing grounds of Europe.