possible disturbances. As they roamed their beat in their yellow and blue striped jeep, each pair of Constabulary troopers was usually accompanied by a German policeman who rode in the back seat. The German policeman knew some English and the troopers were trained at the Constabulary school to understand a number of German phrases useful in police work. If the patrol investigated a disturbance in a German home, the troopers stood by while the German officer made the arrest. If they apprehended suspected displaced persons outside their camp, the troopers again stood by while the German policeman handled the situation. If the offender was an American or Allied soldier or civilian, the troopers made the arrest. This procedure built up the prestige of the new German police in the eyes of their own people. Border control was an important element in the security of the United States Zone. On 1 July 1946, the Constabulary replaced the troopers of the 1st, 3d, and 9th Infantry Divisions at the many static control posts along the borders. At these border posts, often in isolated locations, Allied soldiers met and exchanged greetings across the red and white barricades as they performed their duties of customs inspection, passport control, and law enforcement. During the second half of 1946, 120 border posts employing 2,800 Constabulary troopers turned back from the border over 26,000 undocumented transients. An additional 22,000 illegal crossers were apprehended by patrols within the ten-mile (16 km) border zone and turned over to military government. As the patrols of the Constabulary increased, illegal crossings showed a downward trend because travelers became aware of the regulations and the effectiveness of the Constabulary in their enforcement. Modernization As a result of continuous study of crime statistics, emphasizing the location and time of commission, the patrolling of the interior areas of the American Zone was modified so as to provide for more frequent visits to disorderly areas than to the relatively quiet localities. The potential sources of trouble were judged to be, not in rural areas where peasants gazed in wonder at Constabulary patrols, but in areas where large urban populations scrambled among ruins for food and for jerry-built shelter. Here the patrols, passing every two hours, found that they were missing the real disturbances. Night reports of holidays and weekends told of assaults, robbery, and other serious crimes being perpetrated, but too often the Constabulary was