Why This Could Be A Turning Point In Russia-Ukraine War

Ukraine claimed that Russian Drone has dropped a chemical weapon in the besieged port city of Mariupol. Ukraine deputy minister for defense has said they are checking and that this could be phosphorus munition. 

Both the US and UK too are investigating the claim. 

In this episode of Defense Dispatch we look at what are chemical weapons and why they are deployed in wars?

0:00 - Introduction
2:23 - What are chemical weapons? 
2:55 - Types of chemical weapons
4:31 - White phosphorus
5:22 - History of chemical weapons 
8:41 - What the rules say
9:53 - Can you protect yourself against chemical weapons?

Source: Crux - Youtube