Britain had the largest empire
The Persian Empire, which Alexander took over.
Alexander the Great, but it didn't last very long.
ottoman
There was no Japanese empire, only what they conquered during and immediately prior to WW2.
It was your mom in 1969
The Spanish Empire. Prior to them it was the Aztec Empire.
Prior to World War 1, Alsace was part of the German Empire. The Treaty of Versailes reverts Alsace back under France's control in June of 1919.
Mehmet V was the head of state for the Ottoman Empire during the majority of World War I. He died in July just prior to the their surrender in October of 1918.
Ottoman Empire
Has to be Ottoman Empire, nowadays TURKEY.
Until 1918 Slovakia was a part of Austro-Hungarian Empire. The empire however broke down after World War I and Slovakia became a part of Czechoslovakia in October 1918.
Prior to achieving independence in 1948, India was part of the British Empire. As such, they were subject to conscription by the British, such as was the case with both World Wars.