Anti-tank obstacles include, but are not limited to:
The Czech hedgehog and Dragon's teeth are the most famous types of World War II anti-tank obstacles.
Anti-tank trenches were used on the western front during World War I, and in the Pacific, Europe, and Russia in World War II.
Anti-tank mines are the most common anti-tank obstacles.For implementation of various anti-tank obstacles:
Wikipedia https://en.wikipedia.org/wiki/Anti-tank_obstacles
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