Walmart certainly had 1,760+ PS3s in their warehouses at one point. So the Air Force could have just direct purchased from Walmart (or Target, etc.) if Sony didn't want to sell to them.

2010: 2882 US Super Centers + 608 Sam's Club + 1578 Mexico stores + 321 Canada stores = 5389 stores

People underappreciated the scale of big box national retail. ;)

https://corporate.walmart.com/newsroom/2010/11/03/walmart-st...