The Somme.

Originally Posted by muscogeemike

I whole heartedly agree with Lee Enfield - the one you’re in is the fiercest.
But for consideration I offer Cameron, Mexico, 1863; Dien Bien Phu, French Indochina, 1954; Teutoburg Forrest, Germany, 9 CE; and Cannae, Italy, 216 BC.
But, truthfully, I think there are far too many to list just one.

Cannae was fierce. The cream of Rome's military laid to waste with brilliant tactics.

How about Kursk? Biggest tank battle ever. And veterans said, it was hell.

Originally Posted by BritinAfrica

The Battle of the Atlantic, while strictly more of a campaign then a battle, it cost so many lives, Merchantmen and as well as Navy.

oh yeah i agree, the german submarine wars was churchill's greates fear and nightmare.

While it isn't the fiercest battle in History I believe Gettysburg should get an honorable mention. The third day of that battle was a bloody massacre.

I agree with what others have said, the one you are in would be the fiercest but if I had to pick I'd say Brigade Hill in Papua WW2 , classic battle of a determined enemy turning an opponents flank and effectively routing them (Japanese routing the AIF that is).

One conflict that is never talked about is when the Japanese were driven out of Burma and they lost around 100.000 men in the battle and through starvation

I'd fall back to the old adage..."the one you're in".

the battle of buxar 1764.
siege of lucknow 1857.

I would have to concur with the selection of Stalingrad for the following reasons:
1. the vast casualty figures
2. the decisive result.
3. The scale of battle
After Stalingrad, even Hitler no longer talked about defeating the Soviet Union. From that point on the Germans were simply trying to hold on to what they had already conquered. It was a turning point psychologically for Germany and the rest of the world as well. Many people and nations switched allegiances at that point.
Many of the other battles mentioned were very tough slugging matches, but they weren't game - changers.
The Germans still had a lot of combat power after Stalingrad, but it was apparent that the days of conquest were over. From that point on, they had lost the strategic initiative.