This is a great article written about Pennsylvania WWI Veterans Service and Compensation Files. This is a new collection found at Ancestry.com. The collection consists of service cards, applications for post-war compensation, and questionnaires compiled in 1920. If you have relatives living in Pennsylvania and that served during World War I, this is a must read.
Getting to Know Pennsylvania WWI Veterans Service and Compensation Files http://blogs.ancestry.com/ancestry/2015/11/11/getting-to-know-pennsylvania-wwi-veterans-service-and-compensation-files