Wanchet River in the context of "Wollo"

Menz or Manz (Amharic: መንዝ, romanized: Mänz) is a former subdivision of Ethiopia, located inside the boundaries of the modern Semien Shewa Zone of the Amhara Region. William Cornwallis Harris described Menz as lying "westward" of Gedem but between that former province and Marra Biete.

Donald Levine explains that Menz was divided into three parts: Mama Meder in the center; Lalo Meder in the south; and Gera Meder in the north. Further, he defines its boundaries as "the Mofar River in the south, the Adabay and Wanchet rivers in the west, the Qechene River in the north, and in the east a long chain of mountains which pour forth the waters that drain across Manz and which divide it from the lowlands of Efrata, Gedem, and Qawat." This would roughly equate to the modern woredas of Gera Midirna Keya Gebriel and Mam Midrina Lalo Midir.

Selale (Amharic: ሰላሌ, Oromo: Salaalee), was a province of the Ethiopian Empire located south of Gojjams Abay River, west of Merhabete's Wenchit River, and South of Weleka district Jemma River, north of Entoto Mountains, and east of the Muger River and centered around Grarya. It later became an awrajja, or sub-province, of Shewa. The region was home to the important Debre Libanos monastery built by Saint Tekle Haymanot who was born in Zorare, a district in Selale which lied on the eastern edge of Shewa, to a Christian Amhara family. An Oromo subgroup inhabiting the North Shewa Zone took their name from the original region. They have a population of approximately 2 million. The capital of the sub-province in the 20th century was Fiche.