Major cities in this home of Mount
 Tambora include Medan, Surabaya, and Bandung.
This country is home to the Mentawai Islands, as well as to a volcano which in 1815 had the largest
 eruption of modern times and led to the "Year Without a Summer." Major cities in this home of Mount
 Tambora include Medan, Surabaya, and Bandung. The Kalimantan provinces of this country are bordered
 by the Celebes Sea. This country controls both the Sunda and Madura straits. This country's Banda Aceh
 region was the site of an earthquake on Boxing Day in 2004, which created a massive tsunami. For 10
 points, name this most populous Muslim country, whose islands include Sumatra and Java.
This country is home to the Mentawai Islands, as well as to a volcano which in 1815 had the largest
 eruption of modern times and led to the "Year Without a Summer."
Indonesia