As Germany Successfully conquered France During WW2, and after the Attack on Mers-el-Kébir incident where her sister ship Strasbourg(Who was about to turn into a shipgirl that time) went missing and was assumed that she was sunk by the British, Dunkerque left the Vichy government due to the ideals that caused this disaster in the first place and went into hiding with her ship As Dunkerque walks into France, she saw some of her people suffering to Nazi soldiers and the Vichy government and finally took action when she meet M16a1(That will not be her name at that timeline) who seeks vengeance for her sister's rape and murder (Azur Lane and Girls Frontline isn't mine it belongs to its original owners