Answer:
"When Britain entered World War I, it was primarily in reaction to Germany invading Belgium. Britain promised to defend Belgium in perpetuity under the Treaty of London, which it entered into in 1839. A secondary reason the country joined the war was too ensure that no European country became significantly larger or more powerful than the others."
Answer:
Great Britain entered World War I on 4 August 1914 when the king declared war after the expiration of an ultimatum to Germany.
Explanation:
The official explanation focused on protecting Belgian neutrality. The main reason, however, was to prevent a French defeat that would have left Germany in control of Western Europe.
