[laufer]

Originally Posted by Jaeger

If I'm not mistaken he had Polish relatives that made him political unreliable??

Unfortunately, his connections with Poland were much stronger.
In 1949, Rokossovsky, with a rank of Marshal of Poland, was made commander in chief and minister of defense of Polish Peoples Republic and from 1952 he was deputy prime minister; in this capacity he was an important symbol of Soviet influence in Poland.
Although Rokossovsky was nominally Polish most Poles regarded him as a Russian and Soviet, especially as he spoke poor Polish and even ordered Polish soldiers to address him in Russian instead. As Rokossovsky himself bitterly put it: "In Russia, they say I'm a Pole, in Poland they call me Russian".
Rokossovsky took part in the suppression of the Polish independence movement and sovietization of Poland in general and the Polish Peoples Army in particular. As the superior commander of the Polish Army, he introduced various ways of suppression of anti-Soviet activity and socially or politically insecure elements in the army. Among groups targeted by the repressions were former soldiers of the pre-war Polish Army, wartime Home Army and Polish Forces in the West.
In 1956 during protests in Poznan against Soviet domination of Poland, Rokossovsky approved the order to send military units against protesters. As a result of the action of over 10,000 soldiers and 360 tanks, at least 74 civilians were killed.

source: Wiki