Source A: Excerpt from a Historian's Overview 'Nationalism emerged as a powerful force in the 20th century, influencing political boundaries, independence movements, and conflicts around the world...' Provenance: General historical summary by Dr. Jane Williams, published in 2010.

Using the timeline below, complete the chronological order of these events:

• The formation of the Indian National Congress (1885)
• The independence of India (1947)
• The unification of Germany (1871)
• The breakup of Yugoslavia (1990s)
• The end of apartheid in South Africa (1994)

Arrange these events in the correct order and briefly describe their significance.

Source B: Excerpt from a History Book 'While the Indian independence movement aimed to free a colonized nation, the breakup of Yugoslavia was driven by ethnic nationalism leading to civil war.' Provenance: History textbook, published 2015.

Source C: A Journal Article 'Nationalism has often led to both independence and conflict. Its influence can be seen in the success of colonies gaining independence and in ethnic conflicts tearing regions apart.' Provenance: Academic journal, published 2018.

Create a timeline showing the development of nationalist movements from 1900 to the present. Include at least five key events and brief descriptions for each. Focus on how these events reflect the changing nature of nationalism.