The Cameroon is a relatively new nation, being formed from two colonies, one British and one French. Upon independence the UK's interest evaporated, the French were far happier to stay around. According to a little reseach after this chat I found the French did have a military linkage, although like most of Africa small arms were of communist origin. Wiki:http://en.wikipedia.org/wiki/Cameroon
The president has been in power since 1982, which suggests - well, fossilisation.
Regarding the cross-border coordination; of late statements of intent exist, but I have my doubts it means much.
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