Category:20 mm artillery
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20 mm is one of the most popular calibres of the 20th Century for various types of artillery. Early on, it was used as a tank and antitank gun calibre, but quickly became a popular anti-aircraft calibre. After World War II, it became a very popular autocannon calibre.
The following 53 pages are in this category, out of 53 total. This list may not reflect recent changes (learn more).