During the early months of the involvement of Japan in World War 2, Japanese land armies performed well against British, American and other Allied (Filipino, Dutch) troops. From my research, on books and internet, the usual explanation is that those troops were well-prepared, well-equipped, and had the experience of fighting in China. However, it seems that later in the war, those divisions were not noticeable any more: most of the fights occurred on the water and in the air, and Japanese onl...