Indonesia participates in a number of regional military exercises, and has participated in multinational Naval exercises with India. Indonesia is a nation to watch as it is an up and coming regional economic power that is making significant investments in modernizing its military (long overdue). As the world's largest Muslim majority nation its potential to be major regional actor in the next few years if their economy continues to expand has implications because it can demonstrate that a Muslim nation can succeed economically without huge reserves of oil (though Indonesia is an oil producing nation) and democratic government. In addition to their peacekeeping efforts in Lebanon they sent sent observers to the disputed Thailand-Cambodia border region. I believe they sent peace keepers to Sudan also. I don't think they're part of the multinational counter piracy task force off Somalia, but their Navy did resolve an incident there last year.