Complex sentence: After the cession of Bessarabia, the Romanian secret services began a strong repression of communists, many of them being arrested and sent to prison camps such as the one in Miercurea Ciuc.
Split into simpler sentences: After the cession of Bessarabia, Romania's secret services began a strong repression of communists. Many of them were arrested and sent to prison camps such as the one in Miercurea Ciuc.