History · GCSE · The 20th-Century World
Russia leaves the war and the USA joins
Russia leaves the war and the USA joinsFree12:33Heddy Score 3 of 7, below the standard
What you need to know
- By 1914 Europe was split into two alliances, the Triple Alliance and the Triple Entente.
- A naval race followed Britain's launch of HMS Dreadnought in 1906, and Germany built its own dreadnoughts in response.
- Austria-Hungary feared Serbian nationalism in the Balkans after Serbia grew in the two Balkan Wars.
- The assassination of Franz Ferdinand in Sarajevo on 28 June 1914 was the trigger.
- Because of the alliances, Austria-Hungary's war on Serbia drew in Russia, Germany, France and then Britain within days.
In this clip
Heddy ScoreSeven checks every clip must pass before students see it: trusted, on the map, accurate, focused, accessible, safe, and proven by students.3/7, Below the standard
See the seven stars
- Trusted source · passed. The creator's own upload, live and playable here.
- On the map · not judged yet. A teacher watched it: it mainly teaches this map topic.
- Spec-true · not judged yet. Accurate, and right for the current UK specification.
- Focused · passed. One idea, short enough to watch in one go.
- Accessible · passed. Good captions, clear sound and pictures.
- Safe for children · not judged yet. Right for 11 to 16 year olds, with no sales pitch.
- Proven · not judged yet. Earned from our students: they learn from it, find it helpful and watch it to the end.
Our students
Not enough students yet
Our own students' answers. These are what move ★7 Proven.On YouTube
How the Heddy Score works739K views · 7.64K likes · Unknown Frequencies 90K subscribers
As reported by YouTube on 2026-11-02. Not part of the Heddy Score.Why we picked it
Gives a clear, map-based account of how the alliances turned one murder into a general war, plus a tight summary of why Germany asked for an armistice.
Unknown Frequencies on YouTubechecked 2026-10-22
Plays from youtube-nocookie.com. No YouTube cookies until you press play.