Along with these punishments were a set of methods for extracting value from colonial subjects. In Africa, these included the "corvée" (forced labor for specific projects), "Prestation" (taxes paid in forced labor), "Head Tax" (often arbitrary monetary taxes, food and property requisitioning, market taxes), and the "Blood Tax" (forced conscription to the native Tirailleur units). All major projects in French West Africa in this period were performed by forced labor, including work on roads, mines, and in fields of private companies.