You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Mathilde Ludendorff was the wife of the German General who was victorious at which two battles?" whose answer is Battle of Liège and the Battle of Tannenberg.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Erich Ludendorff victorious battles
Useful Output:

Doc 1: Ludendorff staked everything on a single card, the stubborn pursuit of a “victorious peace” that was to secure German territorial gains in east
Doc 2: Though Hindenburg held the title general-in-chief, Ludendorff, the hero of battles at Liège and Tannenberg in the east, charted the course for
Doc 3: Erich Ludendorff was of Germany's senior army commanders in World War One. Ludendorff found fame after German victories at Tannenburg and
Doc 4: Erich Ludendorff (1865–1937) was undoubtedly one of the most influential figures in Imperial Germany during the First World War.
Doc 5: In 1914, Ludendorff oversaw Germany's first major action of the war: he led the German Army to victory at the Battle of Liège in August 1914,