He became known as the organizer of the Livonian confederation. The Additions for Livonian are 10 letters with diacritics for writing the Livonian language. The most notable campaigns were the Livonian and Prussian crusades. It was the last Semigallian victory over the growing forces of the Livonian Order. A peace with the Livonian Knights was also accomplished in 1367. Livonian war put an end to the Livonian Confederacy. It existed from 1228 to the 1560s, when it was dismembered during the Livonian Wars. The Livonian Coast became part of Latvia. The Livonian branch subsequently became known as the Livonian Order. Today, many Latvians claim to have some Livonian ancestry. There are two syllable intonations in the Livonian dialect, extended and broken. The first prominent Livonian to be christened was their leader Caupo of Turaida. From 1435 to 1561 it was a member of the Livonian Confederation. The Livonian branch continued as part of the Livonian Confederation until its dissolution in 1561. Gotthard Kettler, the last Master of the Livonian Order, became the first duke of Courland.