What is Bunker?
{{Other uses}} A '''bunker''' is a [[military]] building for [[fortification]]. They are usually built below ground. [[Blockhouse]]s are like bunkers, but are built above ground. Bunkers were of big importance during [[World War I]] and [[World War II]]. Bunkers were built during the [[Cold War]] for important political people and for the general public because of the scare of a [[nuclear war]]. ==Types of bunkers== There are many different types of bunkers: === Trench === A [[trench]] is long and narrow. It may be part of a big system of trenches. Soldiers often dig and use trenches. When most of the front-line soldiers use trenches, it is called [[trench warfare]].<ref>''[http://archives.queensu.ca/wwi/warfare.html An archival look at World War I] {{Webarchive|url=https://web.archive.org/web/20081219002104/http://archives.queensu.ca/wwi/warfare.html |date=2008-12-19 }}'' from the [[Queen's University]] Archives, Kingston, Ontario, Canada. Accessed 2008-02-10.</ref> ===Pillbox=== A pillbox is a small building made of [[concrete]] that also has small windows that people can shoot guns out of. The name came from the fact that they look like the boxes that pills came in.<ref>''[http://www.pillbox-study-group.org.uk/whypillbox.htm Why Pillbox?] {{Webarchive|url=https://web.archive.org/web/20090926061025/http://www.pillbox-study-group.org.uk/whypillbox.htm |date=2009-09-26 }}'' - Hellis, John; an article from the ''Loopholes'' journal with further references. Retrieved 2007-09-08.</ref> Pillboxes were used a lot during [[World War I]] when [[defence in depth]] was being used. Pillboxes are most often found [[Military camouflage|camouflaged]] so that they are harder to spot. They can also be part of a trench system, where the pillbox is a firing step that has been built to take grenade blasts and smaller mortar fire. Pillboxes were also built to help protect strategic structures such as bridges or jetties. ===Industrial=== Industrial bunkers are built like regular bunkers and they can be mining sites, foo