$  In late-twenties the mainstay of Polish armoured forces were Renault 17 tanks, first employed in the Great War.$
$In order to modernise armoured units, British Carden-Lloyd tanks were purchased.  On its basis, Polish$
$TK3 tank was designed and directed to the mass production.  The tank was operated by two persons. It was$
$armed with a single machine gun.  TK3 was redesigned, later version, TKS, entered service in mid-thirties.$
$Before the war, some of TK3 and TKS tanks were armed with heavy, 20 mm mod. 38 machine gun.  $
$  These reconnaissance tanks were gathered in companies subordinated to infantry divisions.  Cavalry        $
$brigades also had squadrons of these vehicles, mixed with armoured cars.  TK3 and TKS in September 1939 were$
$already obsolete.  Their thin armour couldn't provide necessary protection against anti-tank fire.          $
$Nevertheless, their small silhouette combined with high speed greatly increased their survivability on the  $
$battlefield.  Their tactical parameters are very alike PzKpfw I tanks.  The result of encounter of these    $
$vehicles was usually a draw, as both of these tanks were equipped only with machine guns.  None of them     $
$could  damage the enemy vehicle.  The exceptions were TK3 and TKS tanks equipped with 20 mm machine guns,    $
$which were able to knock-out German light tanks and reconnaissance vehicles.  Other disadvantages of Polish $
$reconnaissance tanks were lack of broadcasting equipment and their narrow tracks, impeding movement on the  $
$slimy ground.                                                                                               $
