 His treatise was fueled by his dismay at the way Catholics were treated in the Balkans in the Orthodox states in the conditions that followed the fall of the Latin Empire.In the manuscript - which was written for Philip VI - Burcard calls for a Catholic crusade against the Slavic Orthodox countries.In particular, he mentions how the Albanians and Latins suffered under the ""very hard servitude of the most hateful and abominable lordships of the Slavs"".