Mark Daniels was born in Santa Fe, New Mexico. His father was a Technical Sargent in the United States Air Force, working as an Aircraft E & E (2A636) out of Kirtland AFB in Albuquerque. His uncle on the other side of his family was also in the Air Force, working as a 1C6 out of Peterson AFB in Colorado. When his father had long weekends off, the two of them would usually go either hunting or camping, this is where he learned a lot of simple survival/medical techniques (although he isn't close to the next Survivorman). Mark spent a lot of other time around airmen inside the airbases that his family worked at every day. Even though his father was very fond of his career, he still encouraged Mark to go to college. in summer of 2013 he was accepted into UNM Los Alamos, and two years later he graduated with an Associates degree in Emergency Medical Services. Later that summer Mark enlisted into the Air Force, with the added bonus of being able to enlist with the rank of Airman (E-3).
In September of 2015 Mark went to BMT in San Antonio, and in November he graduated with a contract to become a Tactical Air Control Party Airman (TACP). Mark would later be sent to Hurlburt Field, Florida, to complete his Air Force Special Operations training. Upon completion of his entire JTAC training/certification, Mark would be granted the rank of E-4 in early 2017. Mark was then assigned to the 26th Special Tactics Squadron, out of Cannon AFB, New Mexico. His squadron would be deployed to the island of Utes, off of the coast of Chernarus. They were attached to the NATO support mission in the region following the 2009 civil war. He would be stationed there until the outbreak occurred (which would inevitably lead to his stranding in Chernarus). On July 18th and 19th, Mark (as well as other TACP's) was attached to the US Army ODA to coordinate close air support in the southern region of South Zagoria. Following the failures of the airstrikes, the soldiers that he was embedded with were ordered to pull back and move north in an attempt to gain virus samples near the epicenter of the outbreak. Mark was ordered to stay with his assigned ODA until NATO could get a handle on the situation, and he could be reassigned to a new objective.
As of August 5th, 2017, upon repairs of the radio tower at COP Rollo, Captain Banks of the United States Marine Corps would get approval from his commander to transfer to the United Nations, working as a World Health Organization Field Security Officer. He would also get approval to bring along Senior Airman Daniels, as well as two other United States Army Airborne troopers. This did not last long, and after relentless attacks by both the Chernorussian Defense Forces and the Russian VDV the United Nations were either mostly hunted down or forced to disperse themselves. Mark would find himself completely alone and trying to survive in an unknown country. After spending nearly a year trying to not only survive, but also find a way to get back home to the United States, Mark pretty much gave up hope of ever returning to his home country. He stayed low for the next few months, attempting to not make contact with too many locals for fear of being persecuted by the populace of Chernarus. On October 14th, 2018, Mark was held up by a group of thugs in the town of Myshkino (Мышкино), CR. When one of the thugs threatened to burn the only picture of his family he kept in his wallet, Mark lunged at the criminal, and he was shot twice (once in the thigh and once in the abdomen). The bandits left him in the field to fend for himself, and after several hours of grueling pain he was able to crawl to the nearest house and attempt SABC there.
Once November had rolled around, and the snow started falling, Mark was still unable to stand on his own for more than a few seconds, making winter next to impossible to survive. Thankfully the house he held up in had plenty of firewood stocked and a decent supply of running water from the nearby well. Food became an issue however, and once Mark had gone through his already thin supplies of food that hadn't already been stolen, he was forced to eat anything he could find within his vicinity. For the first half of December Mark survived on field mice and the occasional bird that would fly onto the patio of the house. Once January came Mark was strong enough from his injuries and became capable of scavenging the surrounding town for supplies. By the time Mark left Myshkino in April, he had lost nearly 60 pounds and weighed a dangerous 90lbs (41kg).
After his long near-death experience in Myshkino, Mark had decided that being alone for so long was no longer a safe practice, and began actively seeking out people he could trust. He began approaching and staying near settlements to gain an idea of the groups and factions operating within the region. In early June of 2019, Mark would also begin searching his old NATO and UN frequencies for any hope of linking up with someone he knew before everything went to hell. On June 28, 2019, Mark's call would be answered by an old friend of his, Sgt. Fred Dimmock of the US Army. Mark and Fred immediately made it a goal to link up, and Fred even invited Mark into the group he had been running with, The Black Roses. Mark was unsure about the new group he would be joining, but trusted Sgt. Dimmock and his judgement.