Pinky breaks the fourth wall without uttering a sound.
Harry the neighbor makes a phone call to request the "48th Division". In the United States Army. The 48th Armored Division was a division of the United States Army National Guard from September 1946 until 1968. Most of its units were part of the Florida Army National Guard and the Georgia Army National Guard. From 1946 to 1955 it was an infantry division.
Paul Frees voices both the neighbor as well as Pinky's thoughts in this 1965 offering. As time went on, there would be less dialogue in these shorts.
The Berlin wall, mentioned here, had been built in 1961, just 4 years prior. It was a subject of much political debate at the time. The wall stood, as a symbol of the East Bloc, until 1989, when it was dismantled and Germany once again became a unified nation.