When chemica weapons were first used successfully during the war: Bbl6epute ofuH OTBeT: a. in Afghanistan b. with the Finns in 1939 c. in Vietnam d. the second world war e. the first world war

## Step 1<br />The question is asking about the first successful use of chemical weapons during a war. Chemical weapons are a type of warfare that uses chemicals to cause harm or death to the enemy.<br />## Step 2<br />The options provided are: Afghanistan, with the Finns in 1939, Vietnam, the Second World War, and the First World War.<br />## Step 3<br />By examining historical records, we can see that the first successful use of chemical weapons occurred during World War I. The Germans used chlorine gas as a weapon for the first time in the Second Battle of Ypres in Belgium on April 22, 1915.<br />## Step 4<br />This marked the beginning of the use of chemical weapons in warfare.