When was Herbert Hoover elected president

The presidency of Herbert Hoover began on March 4, 1929

Explanation:

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March 4, 1929, when Herbert Hoover was inaugurated as President of the United States, and ended on March 4, 1933.

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.