johnny bi wrote: Romanian 20th Cavalry Division was caught in the encirclement at Stalingrad together with an other Romanian inf division) .
There was no 20th Cavalry Division in the Romanian army. At Stalingrad were caught in the encirclement the
20th Infantry Division and the 1st Cavalry.
As for Romanian cavalry actions, these were generally dragoon style. I do not know of any charges with sabers. These were pretty uncommon even during the Independence War in 1877-78.
One notable action would be the one of the 58th Recon Group (a MG squadron and two cavalry platoons) which was assigned to the 1st Mountain Brigade, during the breakthrough into Crimea in November 1941. The Group was the vanguard of the Mociulschi Detachment. In the morning of 5 November, the group reached the B. Yantura forest and was received with powerful MG fire. They maneuvered to the north and captured 2 officers and 41 soldiers. They continued the advance towards Tuak and managed to surprise about 150 Soviets at the western exit of the town. These were captured without a fight, after one cavalry platoon infiltrated behind them and made them surrender.
But the big pot came the next day. Their mission was to clear the road to Kuruusen of any enemy groups. They found, however, an entire Soviet cavalry regiment. It was lined up in a column without any precautions. The two cavalry platoons quickly rode on each side of the road, firing at the Soviet and managing to surprise them. They threw down their weapons and surrendered. 1,210 POWs were taken and an enormous quantity of weapons. The Group also profited from this occasion to replenish their number of horses.
But, by far the most important Romanian cavalry units were the motorized ones.

Csaba Becze wrote: The two Waffen SS cavalry divisions (8th and 22nd) destroyed in kessel of Budapest, in winter 1944/45. Most of their soldiers were Germans from Hungary.
I knew that the 8th SS Cavalry Division was recruited mainly from German ethnics in the Romanian and Serbian Banat.
The 8th SS did see action in Transylvania in 1944 (but not against partisans, because there weren't any).