I’m not USAmerican, but from my knowledge, I think here are two reasons
Geographic location
When EurAsia saw great destruction in the WW’s they were far away and safe. So they could benefit from arms sales and similar stuff. Also got some experts and researchers fleeing from EurAsia, who helped in their development.
Decline of traditional colonialism opening opportunities for them
Coups and takeover of places which where colonialism and other empires were in retreat.
The power from the 1st point helped here.
Other stuff like the exploitation and murder of natives and slavery helped them set the base for these two points
I’m not USAmerican, but from my knowledge, I think here are two reasons
When EurAsia saw great destruction in the WW’s they were far away and safe. So they could benefit from arms sales and similar stuff. Also got some experts and researchers fleeing from EurAsia, who helped in their development.
Coups and takeover of places which where colonialism and other empires were in retreat.
The power from the 1st point helped here.
Other stuff like the exploitation and murder of natives and slavery helped them set the base for these two points