you forgot about the 200,000 civillians killed in the Battle of Warsaw...

Thx for good info. For me, to call it a real "battle" must be when both parties are trying to win ground(attack or defend- countestrike). I know this is limited, but othervice it might be the defenders objective only to delay or cause heavy casualties. Or the attackers objective only to distract. (Victory might not be the objective.Or to be more precice: a real battle is when both parties are trying "to win".

As such, i think, after the batle of Imphal/Khohima, the Burmese campain cant count as a "battle", as the Japanese where withdrawing (in their own Japanese way). The same with the Italian campain (Cassino, anzio etc). Even though the Germans tryed to counterstike, they where always "holding back" knowing they would have to loose ground eventually.

Giving up ground can be a part of the strategy, but if that is the only objective (holding on as long as u can), it dosent really count as a full battle ( in my book). I gues what im trying to say is that a full battle is when the armies are out to destroy one another. (Trying their hardest, with full suport)

Hmm, not sure I was able to put that right. 

Anyway, the batle of Kusk and the batle of Normandy must be some of the greatest battles of ww2. No one held anything back, both where fully engaged. Stalingrad is a huge battle too, but it lasted for so long (it was originaly a delaying action, from the Russian side), and the counterstike came so late that im not sure if it really can be called a battle, more like two campains.

The battle of Malaya is the worse battle in the history of the British Empire but not the Battle of Singapore because the Japanese invades Malaya before heading south to Singapore. In this battle, the British has 140,000 troops, 158 aircraft, 2 warships HMS Repulse and HMS Prince of Wales, armored car and light tanks. Against Japanese troops of 70,000, 568 aircrafts, 200 tanks. The spread from the northern border of Thailand and Malaya and the battler ended with 11000 troops killed or wounded and nearly 50000 captured by the Japanese troops before the remaining retreat to Singapore. The battle of Singapore is the British last defend.

The reason the British lose against the Japanese is because the British underestimated the strength of the Japanese troops, secondly, major defend located in the south which is Singapore but not in Malaya. Thirdly lack of proper military training for jungle battle, lack of tanks and aircrafts, and totally no defend in Malaya where Japanese can easily invade without any blockages that is the mistakes done by the British defends. The British assume the Japanese aiming for Singapore but there are wrongs. Conquering Malaya is to paralyze the British in Singapore where all supplies cut off and left nothings for the British except SURRENDER. 

In my point of view, the Battle of Malaya is the greatest mistakes that the British ever lose but not Singapore. If, the British well prepared I guess British Malaya includes Singapore wilt not be conquered within a month plus perhaps few months. If, the British can withstand for few months, the reinforcement from India will arrive where it can strengthen up the military power in a bit (I ASSUME)

Please view this link link (THE BATTLE OF MALAYA AND SINGAPORE ANIMATION)