Chad–Nigeria relations in the late 1970s, clashes occurred around Lake Chad, where both countries hoped to exploit oil reserves. Both also sought to defuse these confrontations, first by establishing joint patrols and a commission to demarcate the boundary across the lake more clearly. Then in the early 1980s, the low level of Lake Chad brought a series of tiny islands into view, leading to further disputes and disrupting long-standing informal trade networks. This relationship was also complicated by Nigeria's own instability in the north, generated by rising Islamic fundamentalism. Thousands of casualties occurred as the result of violent clashes in Nigeria throughout
Fishing in Chad Cameroon, the surplus catch was dried, salted, or smoked before being sold. Between 1976 and 1985, production of dried, salted, or smoked fish was estimated at 20,000 tons annually, representing from 20 to 25 percent of Chad's total annual catch. A large share of the commerce in preserved fish was carried on with markets in Cameroon and Nigeria. Small dried or salted fish called salanga were most popular on the markets of Cameroon. Larger smoked fish called banda were generally exported to the major Nigerian market of Maiduguri. Through the mid-1980s, Chad had taken few steps to control or modernize