Final answer:
The French army, under new tactics, overran the Netherlands and Italy, faced domestic opposition by crushing royalists, and spread revolutionary ideals that disturbed traditional European monarchs. Napoleon's campaigns fostered nationalism in conquered regions, but French imperialism ultimately faced resistance and led to independence movements in their colonies.
Step-by-step explanation:
Due to new tactics in the army, the French army soon overran the Netherlands, later invaded Italy. At home, they crushed royalists and internal opposition. European monarchs shuddered as the revolutionaries carried "liberty and revolutionary ideals" into conquered lands. This was part of a broader historical trend during the French Revolutionary and Napoleonic wars, where Napoleon led the army to numerous victories, spreading the French influence throughout Europe and beyond, disrupting the old monarchies and instigating the rise of nationalism. The irony was that the occupied nations eventually turned against the French doctrine, developing their own sense of national identity. In the long term, French imperialist efforts would be met with fierce resistance in their colonies, leading to numerous independence movements throughout the 19th and 20th centuries, notably in Algeria and Indochina.