John Tillman initially set foot on Chernarus during the early sections of the bloody Chernarussian civil war in 2009 as part of a member of the Red Cross. With an overabundance of compassion for his fellow man, he was passed between a multitude of triages all throughout the region to provide medical assistance to civilians who had been caught in the crossfire. During his time in Chernarus aiding the locals, he developed a fondness for the idyllic life that had been shattered by the conflict and immersed himself in the local culture when he could, learning bits of the language and associating with locals. As the civil war drew to a close and his service for the Red Cross concluded, he began to arrange his affairrs in order to move from the United States to Chernarus, which he successfully did in 2011 and took up residency in Chernogorsk and arranged to begin working at the local hospital. Work was not short for him; even though the war had ended, complications from the conflict persisted for years, drawing regulars to his figurative doorstep in search of aid.
Now thoroughly inundated with the Chernarussian culture, he began to familiarize himself with many of his clients, happily getting to know them and even began to associate beyond his workplace, such as going to local bars or even out into the countryside for hiking or even hunting excursions. This all took a turn for the worse once the outbreak was released. Now, Tillman is constantly haunted by the walking husks of people he used to know, most of them patients of his.