In Albania, Xoxe purged all anti-Yugoslav forces from the PKSH central committee at a plenum of 26 February–8 March. The PKSH central committee adopted a resolution declaring pro-Yugoslav orientation the official Albanian policy. Albanian authorities adopted an additional secret document detailing a planned merger of Albanian forces with the Yugoslav army. They cited the threat of Greek invasion as a pretext for the move, arguing that having Yugoslav troops at the Albanian-Greek border was an "urgent necessity". In response to those moves, Soviet military advisers were withdrawn from Yugoslavia on 18 March.