[4] Felton's PhD thesis, titled "Resistance in exile: Sitting Bull and the Teton Sioux in Canada, 1876-1881", was in the field of Native American studies.
[3][6] He was a volunteer for the Royal British Legion in Shanghai, organising the annual Poppy Appeal in Eastern China, from 2010 to 2014.
[22] In October 2019, Center Street published Felton's book Operation Swallow: American Soldiers' Remarkable Escape From Berga Concentration Camp, which details the illegal mistreatment by Germans of U.S. prisoners of war under Nazi captivity in the context of the Battle of the Bulge.
[24][better source needed] In January 2022, the German Tank Museum issued a statement responding to a YouTube video Felton had posted, refuting a claim that they had "recently sold a Tiger I to a private collector and replaced it with a 1:1 plastic model."
The museum accused Felton of "just want[ing] a maximum degree of sensation and emotion in his video, regardless of facts and with minimum workload".
As only Hitler's dental remains are known to have been found, Felton surmises that rather than the Soviet Union falsifying their reports (although they propagandised them),[a] the Germans committed last-ditch forensic fraud.