Focke-Wulf Fw-200 Condor was built as an airliner, then turned into a very good LR maritime patroller and bomber. For some time...
Many of the pre-war German aircraft were built nominally as civil aircraft, be it airliner or transport, but that was never their intended end use.
It did lead to some odd compromises, check the bomb "cells" on an He 111 for an example.
Cheers
Steve