But how did each individual country know if they had enough men to counter the german forces? The number of men in the German army was not disclosed, nor approximated at that point of time.

If they had been more aggressive, the war would have begun before Britain was even close to having a good defence to stop anyone from invading them.Also, at that point of time, Britain was trying their best to avoid a second world war altogether This would easily have led to the fall of Britain, and in the process, demolish all possibilities of not having a second world war.

Shreyas Yes, Britain tried their best to prevent or at the least delay another war from happening. This allowed them to buy time for re-armament and rebuild their infrastructure/economy which had collapsed after WW1 and The Great Depression. Also, this policy was being carried out at a point of time where there was a slight chance of peace. Therefore, Britain tried their best to prevent a second world war, while allowing themselves to be more prepared in-case there is one. Almost no country was able to afford to go to war at that point of time as they were rebuilding their infrastructure and economy which fell after The Great Depression and WW1.