The Second Coalition was a military alliance formed in 1798 against the expansion of Napoleon Bonaparte and his French Republic. This coalition included major powers like Britain, Austria, Russia, and Portugal, who aimed to curb French influence in Europe. The conflict arose after the success of the First Coalition, which had failed to stop Napoleon's rise. The Second Coalition saw several significant battles, including the Battle of Marengo in 1800, where Napoleon achieved a decisive victory. Ultimately, the coalition struggled to maintain unity and faced challenges in coordinating their efforts, leading to its dissolution by 1801, which allowed Napoleon to consolidate his power further.