Linked from
The 8 pages that link to Lake Ladoga, each with the reason it gives.
Siege of LeningradRelated: Its shores and waters formed the main supply corridor to Leningrad.
KareliaRelated: Its northern shores form a major geographic center of Karelia.
Treaty of TartuRelated: The agreement set territorial and navigation arrangements around the lake.
Neva RiverRelated: The Neva begins at this lake’s southwestern shore.
Karelian IsthmusRelated: It forms the isthmus’s eastern boundary.
Lake OnegaRelated: Lake Onega drains to it through the Svir River.
SaimaaRelated: The Vuoksi River carries water from Saimaa into this downstream lake.