Original sentence: In response to these events, an estimated several tens of thousands of resistance fighters participated in unsuccessful partisan warfare against the Soviet regime from 1944-53.Official statistics state that more than 120,000 people were deported from Lithuania during this period, while some sources estimate the number of political prisoners and deportees at 300,000.The mass deportation campaigns of 1941-52 exiled 29,923 families to Siberia and other remote parts of the Soviet Union
Edited sentence: In response to these events, an estimated several tens of thousands of resistance fighters participated in unsuccessful but heroic partisan guerilla warfare against the Soviet regime from 1944-56 until last partisan had been killed.Official statistics state that more than 120,000 people  were deported from Lithuania during this period, while some sources estimate the number of political prisoners and deportees at 300,000.The mass deportation and genocide campaigns of 1941-52 exiled 29,923 families (most of them died there) to Siberia and other remote parts of the Soviet Union