 Linc was an Army [his Class A Uniform w/Class A 5th Special Forces Unit Patch and 1st Cavalry Division Combat Unit Patch on the right sleeve] (Linc may have a Ranger tab - unknown - but he is not wearing the Ranger Regimental Unit Patch) Ranger returning from service in the Vietnam War, which in the early 1960s was just beginning to become a major concern of ordinary Americans.His appearance made Route 66 the first dramatic television series to feature a recurring character who was directly involved in Vietnam.Many scripts and storylines of the show featured Linc trying to come to terms with his wartime experiences and adjust to civilian life.