Complex sentence: Combat losses to enemy action were very low as the very thick armor protected the "Ferdinand" from almost all Soviet antitank weaponry; in fact, most of the vehicles destroyed or captured had been abandoned by their crews after mechanical failure.
Split into simpler sentences: Combat losses to enemy action were very low as the very thick armor protected the "Ferdinand" from almost all Soviet antitank weaponry. Most vehicles destroyed or captured had been abandoned by their crews after mechanical failure.