Looting, combined with poor military discipline, has occasionally been an army's downfall - troops who have dispersed to ransack an area may become vulnerable to counter-attack. In other cases, for example the Wahhabi sack of Karbala in 1801 or 1802, loot has contributed to further victories for an army. Not all looters in wartime are conquerors; the looting of Vistula Land by the retreating Imperial Russian Army in 1915 was among the factors sapping the loyalty of Poles to the Russian Emperor. Local civilians can also take advantage of a breakdown of order to loot public and private property, as in events which took place at the National Museum of Iraq in the course of the Iraq War in 2003. Lev Nikolayevich Tolstoy's novel "War and Peace" describes widespread looting by Moscow's citizens before Napoleon's troops entered the city in 1812, along with looting by French troops elsewhere.