The question was who is the first person who introduced you to D&D? Unfortunately, I cannot remember his name. I was in the Army and stationed in Erlangen Germany in 1975. A new staff sergeant joined the company. He was pulling brigade CQ duty. That mean he needed to monitor the phones and radio all night in case an urgent message arrived. This is a boring job most nights. The sergeant asked three of us to come over and play a game. We picked up some pizza from the local German bar and headed over to brigade headquarters.
The sergeant pulled out small white box containing the original three books, Men & Magic, Monsters & Treasure, and Underworld & Wilderness Adventures; he also had the first supplement Greyhawk. We start rolling up our characters while we ate our pizza (pizza in Germany is a bit different from pizza "back in the world" as we referred to the United States). My first character was a fighter. Grease from the pizza appropriately stained the character sheet.
We started actually playing around 7:00 PM. We ended the adventure the next morning right after reveille. I was hooked.