Final answer:
Language differences during World War 1 influenced military service through language training, national alliances based on linguistic similarities, and communication challenges within the military.
Explanation:
Language differences affected military service during World War 1 in various ways:
- Soldiers' Language Training: Soldiers were required to learn specific languages to communicate effectively within integrated combat units and prevent misunderstandings.
- National Alliances: Linguistic families formed the basis of alliances, as seen with the aid agreement between Russia and Serbia due to their shared Slavic languages.
- Communication Challenges: Postal censors in the American Expeditionary Force had to know a wide range of languages to read soldiers' letters, highlighting the linguistic diversity within the military.
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