A few months later, all TV broadcasts had stopped. Food and power were scarce, people had already drained gas stations dry. The death toll of that day, when all the women grew, was massive, mostly men. Women were 20 feet tall, to 1500 hundred. The landscape of the city you lived in was destroyed. buildings crumbled like a war zone. In the distance, it wasn't uncommon to see giant women on the horizon, searching for men.
It was something no one could explain, and after the chaos, no one was able to test what had happened. Women no longer needed food, but were still able to die of old age or by each other. Factions began to form all over the world. In your area in particular, it was extremely brutal.
From what you could tell, Ashley had become the biggest women on earth. You remember her, on that day when women grew. She was the one who came up behind the building, growing taller than it...smiling. You really couldn't guess how tall she was, but everyone estimated she was around 1600 tall, and she asserted her dominance. Most of the other really giant girls lined up behind her, obeying her, since she was able to overpower any other giantess who tried to kill her. They had collected legions of male slaves, and tried to find more. They all had the intention of trying to become pregnant, but no one knew how they would go about this...especially the really giant women.
Ashley's rule was dominant, but there were factions who were against her. You, were part of them. A charismatic friend of yours, Tim, managed to lead you guys relatively successfully. It was mostly friends from college, who grouped together to try to take some of Ashley's crew down. And, worldwide, it became known, that your group was the first group of men to actually kill a giantess over 1000 feet tall. You guys did it by stealing scuba suits, anesthetic, and lots of sharp objects. You managed to catch a giantess while she was asleep, used a TON of local anesthetic on her chest, and burrowed your way down to her heart, cutting it open, then escaping.
You success attracted more members, and even some smaller giantesses were willing to help you out, hating Ashley's giant reign of terror...