The Spears of the League of the All-Merciful Aimed at the Necks of the League of the Accursed is the celebrated spiritual masterpiece of al-Ḥājj ʿUmar ibn Saʿīd al-Fūtī Tāl, one of nineteenth-century West Africa’s most influential Muslim scholars and leaders. Despite its striking martial title, this is not a manual of warfare. It is a substantial compendium of Islamic spirituality, bringing together Sufi doctrine, sacred knowledge, ethical refinement, remembrance of Allah, spiritual discipline, and the proper conduct of the seeker. Written from within the Tijāni tradition, the work explains and defends its teachings while addressing wider questions of sainthood, spiritual authority, jurisprudence, knowledge of Allah, and the purification of the human soul. Drawing upon the Qur’an, the Prophetic tradition, classical Islamic scholarship, and the teachings transmitted through the Tijāni path, al-Ḥājj ʿUmar presents spiritual transformation as a disciplined journey founded upon sound belief, sincere worship, noble character, and faithful adherence to divine guidance. This English presentation opens an important work of West African Islamic intellectual heritage to a wider readership—students, scholars, spiritual seekers, and all who wish to understand the depth of the Tijāni tradition and Africa’s enduring contribution to Islamic scholarship.