sentences:  The initial prototype, christened "Mareşal" was designated M-00 and began testing at the Sudiți firing range outside of Slobozia on July 30, 1943.Fears that the tank would be toppled by the considerable recoil of the howitzer proved unfounded; however, other problems were noted mostly involving the gun mounting.Testing was considered successful and a committee to supervise the "Mareşal" project was created by orders of Ion Antonescu's cabinet.