Thanks, this was going to be essentially my response. I'm glad you beat me to it so I didn't have to look up the dates.

But for the interested, the Von Neumann became one of the lead developers on the ENIAC. The Von Neumann architecture is based on a writeup he did of the EDVAC. Von Neumann and Stanislaw Ulam worked out monte carlo simulations for the Manhattan project.

The first programmable electronic computer was developed at the same time as randomized physics simulations and with the same people playing leading roles.