The wars just too expensive.
Lets leave, save up for a few decades, then go back and beat whatever army has arisen in the mean time with the terminators we'd have built by then.
Simples
Lets leave, save up for a few decades, then go back and beat whatever army has arisen in the mean time with the terminators we'd have built by then.
Simples
You can fix ignorance, you can't fix stupid.
Tinkety Tonk and down with the Nazis.