Sergeant Major Zack arrives at a new army base with his wife, son and Sherman tank. One night at a bar he "stops" a pimp/deputy from beating a girl. The corrupt sheriff uses Zack's son for revenge and Zack uses his tank.
The least charismatic cast member of Three's Company meets the least charismatic cast member of The Outsiders meets a tank that was obsolete 35 years before the movie was made. Triple yawn. Gave Sherman tanks a bad name at least until Fury was released over 30 years later.