The practice of spreading out combat vehicles in so called "penny packets" (also used in the French Army at the same time) left them at a disadvantage against the German invaders, who concentrated their armour into organic units that could act on their own and that outnumbered the opposing vehicles even if units of the same type met.
[1] The T15 was a version of the British Carden Loyd tankette (Char Léger de Reconnaissance Vickers-Carden-Loyd Mod.1934 T.15).
They had a two-man crew and were armed with a French 13.2 mm Hotchkiss machine gun in the turret.
[3] Total production for the T13: The Wehrmacht operated some captured T13s during the first years of the war, as the T13 had a more powerful main gun than the Panzer I and Panzer II, common German tanks in the early war years.
Instead of waiting for the other tanks to arrive the Belgian army created the T-13 B3, also armed with a 47 mm C.47 gun.