There is a French War Cross and a Belgian War Cross. I assume it's the Belgian one?
To be honest I'm not a fan of the palm sub-categories. Several men in my family got a War Cross during WWI but they had stars, not palms, so they don't fit anywhere. (I am not using these categories on them anyway since they don't seem to be for French soldiers anyway). - Also, that a person received the War Cross will be mentioned on their marriage (if they married later) and death acts, but never with any mention of stars or palms.