defense logic

if defense alliance A got no other alternative than to expand east 

in order to defend themselves because of strategic reality 

and defense alliance B got no other alternative than to prevent that 

in order to defend themselves because of strategic reality 

and 

if defense alliance B got no other alternative than to expand west  

in order to defend themselves because of strategic reality 

and defense alliance A got no other alternative than to prevent that 

in order to defend themselves because of strategic reality 

then new military technologies could change strategic reality 

which would enable defense alliance A to defend their territory without expanding east 

and new military technologies could change strategic reality 

which would enable defense alliance B to defend their territory without expanding west 

technologies that enable a military to control a territory 

and are so effective that it would be unnecessary to have troops on the ground  

some of those technologies are: 

fully automated drone aircraft and drone spacecraft that are able to find and destroy all enemies in an area without any communication with command 

that are are cheap and fast to produce every day and night 

in almost fully automated factories