 Complete the following phrase:  In August 1968, Jaruzelski, as the defence minister, ordered the 2nd Army under General Florian Siwicki of the LWP to invade Czechoslovakia, resulting in military occupation of northern Czechoslovakia until 11 November 1968 when under his orders and agreements with the Soviet Union his Polish troops were withdrawn and replaced by the Soviet Army. In 1970, he was involved in the successful plot against Władysław Gomułka, which led to the appointment of Edward Gierek as General Secretary of the Polish United Workers Party. There is some question whether he took part in organising the brutal suppression of striking workers; or whether his orders to the Communist military led to 