In 1940, the concept of a Union Department of Social Welfare referred to governmental efforts aimed at providing social services and assistance to citizens in various countries. However, the specifics regarding a "Union Department of Social Welfare" can vary depending on the context or country.
In the context of the United States, there was no specific "Union Department of Social Welfare" at that time, but the idea of social welfare was gaining ground due to the impacts of the Great Depression. Programs that aimed to support the unemployed and underprivileged were being developed and expanded. The Federal Government, through agencies like the Works Progress Administration (WPA) and the Social Security Administration, was increasingly involved in social welfare.
In other countries, similar departments or ministries may have existed or were in the process of formation, focusing on poverty alleviation, healthcare, education, and other social services. If you can provide more context or specify a country or region, I can give you more detailed information.