A pioneer (/ˌpaɪ.əˈnɪər/) is a soldier employed to perform engineering and construction tasks. The term is in principle similar to sapper or combat engineer.
Pioneers were originally ...
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part of the artillery branch of European armies. Subsequently, they formed part of the engineering branch, the logistic branch, part of the infantry, or even comprised a branch in their own right.
Historically, the primary role of pioneer units was to assist other arms in tasks such as the construction of field fortifications, military camps, bridges and roads. Prior to and during the First World War, pioneers were often engaged in the construction and repair of military railways. During World War II, pioneer units were used extensively by all major forces, both on the front line and in supporting roles.
