Question

the cities of leningrad, moscow, and stalingrad lay on the border
○ between allied and neutral nations.
○ between axis and neutral nations.
○ between allied and axis nations.
○ among allied, axis, and neutral nations.

Explanation:

In 1942, Leningrad, Moscow, and Stalingrad were in the Soviet Union, part of the Allied powers. The map shows these cities adjacent to the territory controlled by the Axis powers, placing them on the frontier between Allied and Axis-held areas.

Answer:

between Allied and Axis nations.