You'd have to go back to the early 20's to stop the rot from setting in. The Government changed more times than a traffic light, also the Government didn't trust the military and vise versa as many officers though that the Government would go full on commie whilst the Govt thought the military would stage coups and try and either A. Restore the monarchy, or B, establish a dictatorship.
This vid is long but well worth it -
As it highlights just the issues with the army, you've got the Airforce to deal with and really, without a POD some time in say 22 - 23, as well as having more stable governments, there's not a lot that you can do.