(A) ** Battle of Britain
(B) Operation Torch
(C) Invasion of Poland
(D) Invasion of the Soviet Union
EXPLANATIONS BELOW
Concept note-1: -1, 1939: Germany invades Poland, marking what many regard as the start of the war, though Japan invaded China on July 7, 1937. Two days later, France and the United Kingdom declare war on Germany.
Concept note-2: -The Battle of Britain was when Germany bombed Great Britain in order to try and destroy their air force and prepare for invasion. When was it? The Battle of Britain started on July 10th, 1940. It lasted many months as the Germans continued to bomb Britain.
Concept note-3: -Operation Sea Lion After France fell to Germany on June 22, 1940, Hitler set his sights on the Soviet Union but still had to contend with Great Britain. He planned a massive invasion by land and sea, code named Operation Sea Lion, but knew he needed to defeat the RAF first.