new vanguard Japanese tanks 1939-45 / Steven J. Zaloga ; illustrated by Peter Bull Heitai : Japanese infantryman, 1931-1945 / Agustín Sáiz Imperial Japanese Army : the invincible years, 1941-42 / Bill Yenne fortress Japanese Pacific Island defenses 1941-45 / Gordon L. Rottman ; ill. by Ian Palmer campaign study Japanese land operations