Uhh I'm pretty sure the Brits invented tank warfare.
Perhaps if you feel that the tank is soley a support base for infantry or that it shouldn't operate on its own, then maybe you'd be right. The British may have more or less 'invented' the
tank, but its really the Germans that refined tank warfare and showed the many possibilities of tactics using armoured vehicles, both by themselves or in combined arms situations. The Russians may well have been on the way, but its clearly shown in the opening days of the German invasion of Russian during WWII, that most of the people with the nessecary experience had been purged.