Did everyone have to wear a gas masks?

Not everyone was required to wear gas masks; it depended on the situation and the specific risks present. During events like World War I and World War II, military personnel and civilians in affected areas often wore gas masks to protect against chemical warfare. In certain emergency situations, such as chemical spills or natural disasters, local authorities may also recommend or require the use of gas masks. However, in everyday life outside these contexts, gas masks are not typically necessary.