Many tank design flaws were only apparent once troops were already inside them and taking fire in battle.
What is the worst tank design in history? - Quora
The 10 Worst Armies in the World
The 15 Most Dangerous Jobs in the Military
War Thunder: The Best Tanks In The Game, Ranked
The Good the Bad and the Insulting: The 10 Worst Tanks of the Second World War
How many tanks does Russia really have?
The 5 Absolute Worst Tanks in the World
For the Record: Worst tanks ever made
The 10 Most Bizarre Tanks Ever Built -WAR HISTORY ONLINE
Features - SlashGear
What Country has the biggest, worst military Tank? - Quora
Worst Post-War Armored Vehicles Armored Warfare - Official Website
Top 10 Worst / Strangest Tank Designs in History