Analysis of information sources in references of the Wikipedia article "VX (nerve agent)" in English language version.
Given favorable weather conditions, the use of persistent agents such as mustard and VX may pose a threat for many days. Such agents can deny or interfere with enemy occupation of terrain or use of equipment
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: CS1 maint: multiple names: authors list (link)Already in 1988, the United Nations Security Council has been informed of use of toxic weapons by Soviet-supported Cuba in Angola. Belgian toxicologists had certified that residue of chemical weapons—including sarin and VX gas—had been found in plants, water and soil where Cuban troops were alleged to have used chemicals against Savimbi's troops.
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