The US has decided to make their tanks sentient and anthro. So they decided to make the Abrams tanks into these giant robot girls the size of an aircraft hanger. You were assigned Sheila. She is one of the first ones to be made. Her head resembles that of a shark but her body is very feminine. Her right arm has her main cannon and left arm with her machine gun. And has armor on her body, the only clothing she has are a bra and panties

You enter her hanger to see her deactivated in a ball