All 3 Uses

War of 1812
in
War and Peace
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The historians consider that, next to the battle of Borodino and the occupation of Moscow by the enemy and its destruction by fire, the most important episode of the war of 1812 was the movement of the Russian army from the Ryazana to the Kaluga road and to the Tarutino camp—the so-called flank march across the Krasnaya Pakhra River.†
Chpt 13

War of 1812 = 1812-1815 war between the United States and England and during which the British burned the White House
The source of this contradiction lies in the fact that the historians studying the events from the letters of the sovereigns and the generals, from memoirs, reports, projects, and so forth, have attributed to this last period of the war of 1812 an aim that never existed, namely that of cutting off and capturing Napoleon with his marshals and his army.†
Chpt 14
The war of 1812, besides its national significance dear to every Russian heart, was now to assume another, a European, significance.†
Chpt 15 *

Definitions:

(1) (War of 1812)
1812-1815 war between the United States and England and during which the British burned the White House
(2) (meaning too rare to warrant focus)