On 31 March 1939 France and Great Britain pledged to support Poland in case of a German invasion. This move reminds of _____.
Pre-World War 1 militarism
Pre-World War 1 alliance-formation
Post-World War 1 isolationism
None of the above
Pre-World War 1 militarism
Pre-World War 1 alliance-formation
Post-World War 1 isolationism
None of the above