cluborlov | In the case of the US empire, it has not continued to expand by territorial acquisition. The last territory acquired was the Marshall Islands in 1947, which then became a UN Trust Territory, followed by Independence in 1986. What has continued to expand is the presence of US military installations all over the world. As the recently deceased analyst Chalmers Johnson explained, the US is an “empire of bases”, not an empire of colonies. The US has 800-1000 foreign military bases and 4-5000 bases in the US. Colonies are so passé these days. Why bother with colonies when you can impose your will with a few bases, and you don’t have to manage the whole country. Besides you can outsource most everything to contractors, so you don’t even need the consent of the governed. All you need is their tax money, which the sheeple continue to provide with barely a bleat.
Looking at the DOD Base Structure reports it is possible to graph the total acreage owned by the US military both in the US, in foreign countries, and in US foreign territories. Since both foreign countries and territories are occupied, I will lump them together. It is also valid to use total military acreage including the US, since the 50 states of the US are essentially occupied territory of the US military as well.
I was unable to find data before 1957, but total acreage under management by the US military had a recent peak in 2007, while foreign acreage peaked in 2004. This data is from official US DOD base structure reports, which according to Chalmers Johnson leaves out quite a bit, but from a relative point of view over time, it is probably adequate. I have included the excel sheet data, and others are welcome to add to the data and do a more thorough job graphing this data.
Military spending
Looking at US military spending below, it has continued to rise, despite the recent decline in acreage under management. This is entirely consistent with Tainter’s theory of declining marginal utility to expanding empires, as imperial overstretch becomes more and more expensive, and returns to expenditures begins to decline, and even become negative. It would be entirely consistent for the expenditures to continue to rise as the empire attempts to hold onto its existing level of military acreage, until interest on the debt causes a default, and then expenditures also collapse.