M551 Sheridan NTC California September 12, 2014 1529 × 1601 World War 3: “This is where armor fights!” Idaho National Guard returns to Cold War era ‘Total Force’ warfare training! First female combat mechanic! Pure Armor ecstasy! An NTC OpFor Sheridan overrunning my OP, back when I was 13F for Idaho’s 1st 148th Artillery, 1998. Written by: Hutchins AAron on September 12, 2014.