Y+0, Yellowstone erupted. It was the worst eruption that planet Earth had experienced in several million years. The eruption destroyed everything within fifty miles of the northern side of the Yellowstone reservoir. Extensive damage reached a radius of nearly five-hundred miles. The ash cloud would have destroyed the crops in the Midwest if it happened before the harvest. Instead, it destroyed the topsoil of the world’s best farmland. The acid rain also damaged much of the forests in the Northeastern US. The death toll was in the thousands.
The Y+1 growing season did not happen globally. Luckily, the completed harvest had prepared a significant food store for the planet. However, many countries around the world halted exports in response to the impending loss of food production. Many countries around the world took immediate action to create warehouse production of crops. By the end of the year, they replaced one tenth of global food production. Global deaths were in the hundreds of thousands. The US military completed a withdrawal from bases outside the US. This resulted in another hundred thousand deaths from food riots and regional wars. The action strained US/EU relations. The excessive amounts of volcanic ash in the atmosphere led to a crash development of rocket-powered aircraft.