Why were the Japanese so successful in the early years (1937–1942) of the war against a variety of Asian, European, and American powers?


Notice: Trying to access array offset on value of type bool in /home/onliiuxo/public_html/wp-content/themes/betheme/functions/theme-functions.php on line 1490

Notice: Trying to access array offset on value of type bool in /home/onliiuxo/public_html/wp-content/themes/betheme/functions/theme-functions.php on line 1495

Why were the Japanese so successful in the early years (1937–1942) of the war against a variety of Asian, European, and American powers?


Notice: Trying to access array offset on value of type bool in /home/onliiuxo/public_html/wp-content/themes/betheme/functions/theme-functions.php on line 1490

Notice: Trying to access array offset on value of type bool in /home/onliiuxo/public_html/wp-content/themes/betheme/functions/theme-functions.php on line 1495

Why were the Japanese so successful in the early years (1937–1942) of the war against a variety of Asian, European, and American powers?  Need to have sources cited as well please.