"Over time, the Waffen-SS created some 42 divisions and three brigades as well as a number of small, independent units. Of the divisions, seven were panzer divisions. The balance included 12 panzergrenadier divisions, six mountain divisions, 11 grenadier divisions, four cavalry divisions, and a police division. Many of the divisions, organized late in the war, were divisions in name only and never exceeded regimental strength. The SS panzer divisions were the purest in terms of German members, as well as being the best equipped and supported of all German combat units. They formed the strongest and politically most reliable portion of the Waffen-SS. The creation of an SS panzer division was sometimes evolutionary. Formed from Hitler’s bodyguard unit, the Leibstandarte SS Adolf Hitler became a full infantry regiment with three battalions, an artillery battalion, and antitank, reconnaissance, and engineer attachments in 1939. After it was involved in the annexation of Bohemia and Moravia, it was redesignated the Infanterie-Regiment Leibstandarte SS Adolf Hitler (motorized). In mid-1939 Hitler ordered it organized as an SS division, but the Polish crisis put these plans on hold. The regiment proved itself an effective fighting unit during the campaign, though several Army generals had reservations about the high casualties it had sustained in combat."