REMOVE

1. Composite Map
2. World Atlas
3. Canada
4. 1861

WHAT

1. Atlas Map (1)
2. Physical (1)

WHERE

1. Delaware (1)
2. Maryland (1)
3. Mid-Atlantic States (1)
4. New York (1)
5. Pennsylvania (1)

WHO

1. USSR (1)
2. USSR (Union of Soviet Soc … (1)

WHEN

1. 1967 (1)