No. 'Attack on Titan' is a fictional story created by Hajime Isayama. It's set in a fictional world with its own unique rules, characters, and plotlines that are products of the author's imagination.
The story of 'Attack on Titan' is not real. It takes place in a world where there are complex political situations among the humans as well as the threat of Titans. The story has a lot of themes like survival, freedom, and the search for truth, but it's all within the realm of fiction. It has been very popular worldwide, but it remains a fictional creation.