If you had to pick the best time and place to be in the service of a country. What service and what country and at which point in History?

What country would you have liked to support and in which battle in history?
Examples would be US during the Battle of the Bulge, Confederate troops at Vicksburg, Russian troops at Stalingrad, British troops at Waterloo, Israeli troops during the Yom Kippur War, for example.