Complex sentence: Only the handful of tankettes armed with 20 mm guns had a fighting chance against the enemy tanks; in one instance on 18 September 1939 a 20 mm gunned TKS commanded by sergeant Roman Orlik destroyed three German Panzer 35 (t) tanks.
Split into simpler sentences: Only the handful of tankettes armed with 20 mm guns had a fighting chance against the enemy tanks. One example of this occurred on 18 September 1939 when a TKS armed with a 20 mm gun commanded by sergeant Roman Orlik destroyed three German Panzer 35 (t) tanks.