Not for a while. Around April 7 the tear gas will clear out and they can reopen.
The Yugoslav Army was disposed in three groups. Army Group I, based on Zagreb, was facing us across the frontier; Army Group II was covering the approaches from Hungary; and Army Group III, with the bulk of their troops, was disposed along the borders of Rumania, Bulgaria, and Albania. The strategic position of the Yugoslavs was most unfavorable, and when hostilities began they had only succeeded in mobilizing two-thirds of their twenty-eight divisions and three cavalry divisions. They lacked modern equipment, there was no armor at all, and the air forcé possessed only three hundred machines.
The military weakness of Yugoslavia was accentuated by political, religious, and racial divisions. Apart from the two main groups, the Serbs and the Croats, there were millions of Slovenes, Germans, and Italians, each with separate national aspirations. Only the Serbs were really hostile to us, and our propaganda took the line of offering liberation to the other races, and particularly the Croats. At array headquarters we had a Propaganda. Company, working under my supervision and staffed by various language experts. We learned that the formations facing us [in Austria] were chiefly Croatian, of whom only about a third of the personnel on paper had obeyed the mobilization order. The Propaganda Company worked at top speed, preparing pamphlets and loudspeaker records to put our opponents in a receptive mood for surrender