The Hollywood star told Reuters that the Bosnian War film struck a deep emotional chord within her.
"I didn't go into this wanting to be a director, I went into this film because I was moved by the themes," Jolie explained. "It wasn't a normal film experience for me, it was an education every day in humanity and in unity, and also getting to know a culture."
Jolie also expressed regrets that she didn't pay more attention in her youth to the humanitarian crisis that was caused by the Bosnian War.
"As I looked into Bosnia - because this was [when] I was a teenager - I felt responsible to pay more attention because I didn't at the time... I was too young and living my life," she revealed.
"This is my generation that went through this in Europe. So I read more and I learned more and I was just so taken by how little I knew, how little the world speaks about it, and I felt compelled to put this story together."
In The Land of Blood and Honey, which is now playing in US cinemas, has received a 'Best Foreign Language' Golden Globe nomination.
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Watch a trailer for In the Land of Blood and Honey below: