illages became separate communities within the district. In 1806 the Duchy of W�rttemberg became the Kingdom of W�rttemberg.
In 1815, Heilbronn again became a staging area for major armies ahead of the campaign against Napoleon, and 10,000 troops paraded in front of Emperor Franz of Austria and 126 German princes and generals in the Theresienwiese. Tsar Alexander I of Russia met in Heilbronn with the Baltic Baroness Juliane von Kr�dener who talked him into founding the "Holy Alliance".
Industrialization arrived in 1820. When the first train lines were placed in service in W�rttemberg, Heilbronn was at the end of the line of the northern branch that connected Heilbronn with Stuttgart and further fueled industrialization.
For a while Heilbronn suffered from the upheavals of the Baden Revolution that its civil guard participated in. During that time the 8th infantry regiment switched sides and joined the revolutionaries until it was subsequently disarmed and force-transferred out of the area.
Heilbronn became part of the German Empire in 1871 during the unification of Germany.
In the 1860s the train tracks were extended from Heilbronn to Heidelberg via Bad Wimpfen, to W�rzburg via Osterburken, and to Crailsheim (and later on to Nuremberg) via Schw�bisch Hall. In 1880, the Kraichgau line was completed and created an important connection towards the Karlsruhe area and by the end of the 19th century Heilbronn had become an important hub and second only to Stuttgart as one of W�rttemberg's largest industrial cities.
The year 1892 brought electricity via a connection to the power plant in Lauffen and thus Heilbronn became the first city in the world to enjoy long distance supply of power.
With the dissolution of monarchy in the German Reich as a result of World War I, Heilbronn became part of the Free People's State of W�rttemberg in 1918.
After almost a century of economic boom and growth of the local industry
