- Ties with Britain - Historical: Australia was part of the British Empire and felt strong patriotic ties.
- Colonial obligations: Australia felt a duty to support Britain during times of war and honor the "sacrifice" of British soldiers in their defense.
- Shared values: Sense of identity and unity among members of the British Empire.
Patriotism and Nationalism
- Jingoism: A feeling of national pride and a belief that the nation has the right to exert its influence on a global scale.
- War fever: Public enthusiasm and support for the war, stoked by propaganda, patriotic speeches, and a sense of adventure.
Defense of Territorial Interests
- German territories: Fear that Germany's colonial ambitions in the Pacific could threaten Australian interests and security, especially in relation to New Guinea and other Pacific islands.
Economic Considerations
- Trade: Concerns that war would disrupt Australia's trade, particular with Britain and other European nations.
International Alliances
- Anglo-Japanese alliance: Australia was part of this agreement that obligated Britain and, by extensions, Australia to come to Japan's defense if it became embroiled in war with Germany.
It's important to note that not everyone in Australia was in favor of the country's involvement. There were pacifists and anti-war activists who opposed participation. However, those views were not as influential as the prevailing patriotic sentiments and the belief that joining the war was essential to defending Australia's interests and allegiances.