This is a lot of five US Army Aggressor Army War Games tags from Fort Riley in Kansas. Included are two 6 x 3 inch tags and two 5.5 x 2.75 inch tags and one Esperanto card. The tag information is the same on both size cards, with "Aggressor was Here" on one side, and "How's Your Security?" on the other. The Esperanto tag is printed on only one side. Fort Riley in Kansas was the focus of this war games program from 1949 to about 1970. The Tags are part of an enemy harassment program. The small form cards are written in Esperanto, the language of the Aggressor nation. An article about the program can be found at this link
in a 1959 Florida newspaper. Theses items have some yellowing and slight foxing with age and some slight bends. Several lots are available, so the cards will have slight variation.