Pope Innocent XI, after trying unsuccessfully to induce Louis XIV of France to aid Leopold against the Turks, appeals to Poland with a large subsidy.

Although Sobieski and the emperor had made a pact of alliance earlier that year, the Polish king is reluctant to come until Innocent persuades Charles of Lorraine to join a combined army with the electors of Saxony and Bavaria as well as thirty German princes.

The eight thousand troops of this relieving army form along the top of the Vienna hills, and, on the morning of September 12, Lorraine's and Sobieski's forces attack the Turks.

The battle rages for fifteen hours before the Turkish invaders are driven from their trenches.

The red tent of the grand vizier is blown up, but he escapes while thousands of members of his routed army are slaughtered or taken prisoner.

Reports state that it takes the armies and the Viennese a week to collect the booty that has been left behind in the Turkish camp.

As Mustafa Pasha's army retreated, it had left several large bags of green beans behind in their camp.

These sacks contain unroasted coffee beans which as legend has it, forms the nucleus from which the Viennese coffee trade begins.