I've learned throughout my life, there's people that I think about often, that I've had business or recreational relationships with, that have absolutely NO IDEA who I am.
I had an assigned mentor before I went into theology school. He & I met 3 times a week, had several trips together. When I got a bit too big for my britches, he gave me a dressing down that I pull from all the time when dealing with others.
We lost touch after he & his family moved, but last year, my wife & I saw him & his wife at a restaurant, so I went over to say hi. He said I looked familiar, but he wasn't sure he remembered me. I recounted how we knew each other, & he finally remembered my brother's name. He said it was good to see us again & as we were walking away, the couple they were with asked exactly who we were, & I heard him & his wife say that they had no idea.
I felt Mayfeld was in the same boat. Due to the actions of the officer, he thought about him ..A LOT. The guy had killed tens of thousands of his own troops during Cinder, so he sure didn't remember this one lowly field agent.
I thought it was awesome, when Mayfeld realized the guy didn't recognize him, he brought up Cinder himself. I knew then the guy wasn't gonna make it. Lol