Boghdadi submitted his resignation again on 16 May 1964, after disagreeing with Nasser's decision to send Egyptian troops to North Yemen to support Nasser's partisans in the civil war. He referred to the war as "Nasser's Vietnam." Boghdadi also wanted a more circumspect policy of "Egypt first." In response to his resignation, Nasser put Boghdadi's brother Saad under house arrest and prevented his brother-in-law from traveling to the United Kingdom to complete his doctorate. Nasser also claimed Boghdadi was implicated in illegal Muslim Brotherhood activities.