For 10 points, name this lake named for a nearby nation with capital at Lilongwe.
Portuguese Caspar Bacarro was the first European to report this body of water's existence, which was the site of the first naval action of the First World War, when a single gunboat was disabled by the SS Gwendolen in a port then called Spinxhaven. A territorial dispute in this body of water resulted from the 1890 Heligoland Agreement that gave the polity controlling its northeastern shore no jurisdiction over it. Other ports on this body of water include Likoma Island, Nkhata Bay, and Chipoka. This lake has a southeasterly wind called the mwera. Two countries that border this lake is prefer to call this lake by a generic term from languages spoken around it that literally means "Lake Lake." This lake lies south of the David Livingstone Mountain Range and is drained a tributary of the Zambezi River; that tributary is the Shire River. This southernmost lake of the Eastern African Rift Valley system separates Mozambique and Tanzania from its namesake country. For 10 points, name this lake named for a nearby nation with capital at Lilongwe.
Portuguese Caspar Bacarro was the first European to report this body of water's existence, which was the site of the first naval action of the First World War, when a single gunboat was disabled by the SS Gwendolen in a port then called Spinxhaven.
Lake Malawi [or Lake Nyasa; or Lake lake before mention; prompt on "lake"]