Would the Pacific crisis draw in more African troops?

Would a Japanese threat to the empire increase South African participation or the mobilization of African troops?

Potentially; South African politics would complicate the response, but Britain would probably rely more visibly on troops recruited across Africa.

A viewer asks whether South Africa might contribute more if other forces moved from the war against Germany to face Japan. That is possible, although South Africa's internal politics would remain a constraint. The wider empire would probably rely more heavily on mobilizing troops from across Africa. Large numbers of African troops already served Britain in several theaters during the actual war, but the extra demands of this scenario could make their role both larger and harder for later histories to overlook.