How old did you have to be join the army during World War 1?

Answer 1

The World War I Selective Service Registration Cards were created when men registered for the World War I draft in 1917 and 1918 under the Selective Service Law and Regulations. This is a civilian record, not a military one, and is an excellent source for genealogists researching a family who lived in the U.S. in 1917--1918 that included a male born between 1872--1900.

Ages & Birth Dates Covered-- Three draft registrations were held.

First registration -- men born June 6, 1886 -- June 5, 1896

Held June 5, 1917; registered all men between 21 and 31 years of age.Second registration -- men born June 6, 1896-- June 5, 1897Held June 5, 1918; registered all men who had become 21 years of age since June 5, 1917, not previously registered or already in the military.

Supplemental registration --men born June 6, 1897-- August 24, 1897

(Considered part of the second registration)

Held August 24, 1918; registered all men who became 21 years of age since June 5, 1918, not previously registered or already in the military.Third registration -- men born Sept 11, 1872 -- Sept 12, 1900

Held Sept 12, 1918; registered all men between the ages of 18 and 45, inclusive, not previously registered or already in the military.

Answer 2

16 yearsolds

this answer isn't actually true you had to be 18 years old but some people as youn as 16 pretended they were. :')

Answer 3

In the UK fighting soldiers had to be 14 but there were no real age checks and boys of 12 were proudly sent off to fight by their mothers.

Answer 4

18, but most boys lied about there age and were accepted anyway

(:

Answer 5

18