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.
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.
The total size of the Soviet force was 1,300,000 soldiers with 500,000 soldiers in reserve that ended up being tossed into the battle at Prokhorovka. Germans troops’ strength was 900,000 soldiers. The Soviets had ~ 3400 tanks vs. the Germans ~ 2700. The Soviets had >2700 aircraft and the Germans had ~ 2000. Unlike Stalingrad which was a battle of attrition Kurst was a head on full bore attack into vicious well entrenched Red Army. It finally dispelled the myth that the Soviets couldn't win in a summer offensive. The exact amount killed is still unknown. But many hundreds of thousands lost their life in a battle that only lasted ~1.5 weeks.
Well, notice that it says bloodiest. Just because it had the most deaths, doesn't mean it was the fiercest. Many battles have had little casualties but the fighting was fierce. As I have said, it depends what you are meaning by 'fierce'.
Not necessarily. You can have fierce battles in that the fighting was so fierce that both sides found it hard to advance or retreat and so forth. But very few men died in the conflict. .
I agree. The Kursk struggle was one of little maneuver. Perhaps some in the south by Manstein, however this was quite limited in scope. It was more of a WW1 style battle sending a large army head on into well fortified defenses with the defender having a large superiority in men and equipment. The Germans only had a qty of ~ 100 tiger tanks, some “Elephants and Panthers” which had teething issues. Many Germans went to battle in the older Panzer III which were inferior to the T-34.
Despite a possible breakthrough in the south they eventually were defeated by attrition. Thus ending any large scale offensive capabilities for Germany. From here the Germans direction was west. However some notable counter offensives took place I.E.: Budapest
when Hannibal's army killed 45,000 Romans in a single day