Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Federal Charter or Letter of Alliance (German: Bundesbrief) documents the Eternal Alliance or League Of The Three Forest Cantons (German: Ewiger Bund der Drei Waldstätten), the union of three cantons in what is now central Switzerland. It is dated in early August, 1291 and initiates the current August 1 national Swiss holiday. This agreement cites a previous (lost) similar pact. It is actually exhibited at the archives of the Swiss Charters of Confederation in Schwyz. This inaugural confederation grew through a long series of accessions to modern Switzerland. The Alliance was concluded between the people of the alpine areas of Uri, Schwyz and Unterwalden (homines vallis Uranie universitasque vallis de Switz ac communitas hominum Intramontanorum Vallis Inferioris). The participants are referred to as conspirati and (synonymously) coniurati, traditionally translated in German as "Eidgenossen".