The ANM's weekly paper "Al-Ra'i" was shut down in Jordan in 1951, although Hindi reopened it from Damascus in January 1955. By then, the movement had grown little, having much of its potential membership sapped by other nationalist parties, namely the Ba'ath and al-Hawrani's Arab Socialist Party, which merged in the mid-1950s. Only between 1956 and 1957 did the ANM's membership increase significantly, particularly among teachers and students at Palestinian refugee camps, and to an extent the Jordanian middle class. The ANM established a military around that time under Hindi's leadership and in cooperation with the Syrian intelligence chief Abd al-Hamid Sarraj. Hindi facilitated the military training of volunteers at Palestinian-Syrian army camp in Harasta. The faction participated in the 1958 Lebanese conflict, fighting alongside Arab nationalists in Tyre and Tripoli.