Not entirely sure what argument you are attempting to make. That we are tiring ourselves out? No, we are not. For our level of wealth and our size our military is still small. There is absolutely no reason why we could not expand it and increase funding.
That we should keep our military at home? Why? Logistically speaking China nor Russia are traditional threats as of yet. They have large armies but not the reach to use then far from home. No, unlike Rome, there are no barbarians at the gates. There are no great hoards ready to overrun the border.
Remember that Rome became "Rome" by being proactive with its military. It began as a small city state and expanded into an empire.
Well there are Canadians. ... :lol:
British empire was at it's largest at the end of WWII but within about 20 years it was almost completely dismantled. I think that the reasons for the fall are below. ... It did not help that it had been a German thing to destroy our empire since Bismark unified Germany and the Kaiser had seen a Spithead review of British sea power. Major Nazi goal in WWII following being rebuffed when they offered peace on terms.
1. The US did not want us to have one, and we owed shedloads of money to them, and when Suez occurred they threatened a run on the pound. ... and
2. People in this country having fought a mad evil dictator who was acting exactly like an evil empire and felt the possibility of being subjugated though it a good thing to allow emerging countries to have their independance.
Generally speaking it was a bad thing to have done but I was discussing this with an Indian work collegue and the point was made that at the time the options were not:
Freedom of the sub-continent and self determination, but rather
1. Be a member of the British empire (Flag or not)
2. Keep the Mogal (not going to fly that at all) or
3. Join another European empire most probably the French, who all ready were playing fast and loose in India.
It was just one of those times in History.
Empires just do not know when they are going to fail. It could be argued that American power is falling relatively against China ever since 'ping pong' deplomacy. The US military is still great, many excellent and well motivated fighting men and great equipment but they are going to need the financial where with all (See Royal Navy for an example) to maintain it on-going. We will see if this can be done.