The text boxes below have been placed in a random order. Reorder the paragraphs.
A. German invasion of Poland official triggered the Second World War.
B. But Polish forces could not defend a long border.
C. In the beginning, Britain and France were hopeful that Poland should be able to defend her borders.
D. They lacked compact defense lines and additionally their supply lines were also poorly protected.
E. Meanwhile, the world had woken up to the potential of atomic energy and countries were conducting tests to exploit the same.