Government owned and operated infrastructure may be developed and operated in the private sector or in public-private partnerships, in addition to in the public sector. As of 2008 in the United States for example, public spending on infrastructure has varied between 2.3% and 3.6% of GDP since 1950.
Definition of outpost for English Language Learners. : a large military camp that is in another country or that is far from a country's center of activity.
fort. 1  an enclosed place or fortified building for military defense, equipped as with earthworks, guns, etc. 2  a permanent army post, as distinguished from a temporary camp.