Cameroon provided soldiers on both sides Ewondo Bali and Bamain supported Germans.
Cameroonians provided raw materials for the war provides rubber. Which was highly needed during the war.
They also acted as Spies providing information that will help fighting for the located enemy. They provided food and shelter to the party they supported.
Cameroonians acted as carriers during the war.
Cameroonians also interpreted and scouts.
Cameroonians also carries out sabberage like destroying a bridge after choosing it.