How is our nations commitment to a strong military proper and necessary?

This is only focusing on the 70's, 80's, and present time. Can you please use examples on how it is good for our nation to have a good and proper military.How is our nations commitment to a strong military proper and necessary?Well if you watch the news? You will see alot of bad people! That dont like the usa. I am a proud veteran of the usa. As well as many of my family members.