The Third Coalition was a military alliance formed in 1805 against the growing power of Napoleon Bonaparte and his French Empire. This coalition included major European powers such as Britain, Austria, Russia, and Sweden. The goal was to curb Napoleon's expansion and restore balance in Europe after his earlier victories. The coalition faced a significant challenge at the Battle of Austerlitz, where Napoleon achieved a decisive victory. This battle is often regarded as one of his greatest triumphs, leading to the dissolution of the Third Coalition. Following this defeat, many member states were forced to sign treaties that favored France, further solidifying Napoleon's dominance in Europe.