The Nicaraguan Navy of Somoza's National Guard consisted of a few old patrol boats in the early 1980s. The Sandinistas acquired more modern vessels, although none were larger than fifty tons. The navy's mission was to discourage seaborne Contra attacks and to deter CIA-run operations such as the destruction of diesel storage facilities at Corinto in 1983 and the mining of Nicaraguan harbors in 1984. The Sandinista navy (—MGS), which had reached a peak strength of 3,000 personnel in 1990, suffered a sweeping reduction to 800 by 1993.