- Global Peace Index: The Global Peace Index is comprised of 22 indicators in the three categories ongoing domestic or international conflicts; societal safety; and security and militarization. A low index value indicates a peaceful and safe country.
- Military branches: This entry lists the service branches subordinate to defense ministries or the equivalent (typically ground, naval, air, and marine forces).
No date was available from the Wikipedia article, so we used the date of retrieval.
SOURCES: http://www.visionofhumanity.org/#/page/indexes/global-peace-index, Global Rankings. Vision of Humanity.; CIA World Factbooks 18 December 2003 to 28 March 2011; CIA World Factbooks 2010, 2011, 2012, 2013; Wikipedia: List of countries by number of military and paramilitary personnel (The list)