A tournament of two halves.....

...two periods...disparate but linked by a desire to succeed!
The early part of WW2 - stretching from the Blitzkrieg attacks into Poland and then into France to the early desert conflicts in North Africa.
The early part of WW2 - stretching from the Blitzkrieg attacks into Poland and then into France to the early desert conflicts in North Africa.
....followed later that century by......

.....Vietnam. A lengthy conflict involving several nations where as ever the biggest loser was the civilian population of the war torn southern part of the country.