Vintage WWI Era Service Flag Postcard Home Country's Call Louisville KY Posted For Sale

This is a vintage postcard featuring an illustration of a home entrance with a service flag displayed, accompanied by patriotic text: 'Faithful to our Country's call, The home where the Service Flag waves. Let's honor it!'. The postcard appears to be from the World War I era, reflecting the sentiment of honoring those serving in the military. The back is addressed to 'Mrs. Ibelen Green, #236 E Jacob St., Louisville Ky.' and shows signs of being posted, though no stamp is present. A collectible piece of history reflecting American patriotism.