Your country practices they same. They actually started much earlier than the US, and it was considered a high mark of patriotism that the Princess Elizabeth joined in the armed forces as well. She took a job as a driver and mechanic for the British Army.
Princess Elizabeth then became Queen Elizabeth the second in the 1950s.
Now, one country didn't use women as part of the armed forces: Germany, the enemy of England and the US. They surrendered in the end because their forces couldn't take the constant barrage of England, American and other Allied powers.