I dont know did someone allready asked this, but, let's say that Germans do not launch Battle of Verdun? Let's say that Germans ( Falkenhayn ) decide that it would be foolish to vaste precious amount of soldiers on their disposal there so they decide that no major operation on West will happen.
Since Germany had about 350 000 soldiers killed there ( and many more wounded and even more soldiers and resources engaged there ), what would be the consequences if battle never happened? And if Germans used that soldiers and resources somewhere else?
Germany did not have 350,000 killed at Verdun, they had 350k casualties.
http://www.wereldoorlog1418.nl/battleverdun/slachtoffers.htm
They had about 100k dead and the rest were wounded. They also had double the number of wounded return to combat later compared to the French.
The numbers on Wikipedia are way off.
Part of the problem with the premise is that Falkenhayn was a 'westerner' who saw that the West would be the decisive theater, so he launched Verdun as a means to seize the initiative in a year when the Allies would be bringing their enormous manpower to bear, thanks to the British finally fielding an army and the Russians finally mobilizing their vast manpower. So Germany went after the weakest Entente power in the one area where Germany had an advantage on the front.
Verdun in conception wasn't a bad idea at all, but it was very poorly executed by the Crown Prince's 5th army.
The idea was to confine the fighting to the East Bank of the Meuse where the German 5th army ringed the French on three sides; the Germans would advance very slowly and force the French to bleed to death by holding the East Bank where German artillery would vastly outnumber them.
The problem in execution was when the French collapsed during the initial bombardment and ran away the 5th army followed quickly and left their artillery trailing behind, which let the French artillery rake them as they moved up. Under the original plan the Germans wouldn't have advanced and let the French recover, reoccupying some of their positions, while the Germans slowly moved forward like how von Mudra conducted the Argonne offensive in October 1914. Unfortunately the Crown Prince and his staff did not get that idea so ran forward, trying to capture ground and as a result sacrificed their infantry to capture ground. Then the Germans found themselves in the ugly situation where they couldn't bring their artillery that far forward that quickly, so their infantry had to fight without it to capture defensible ground while under French artillery fire. Then the campaign became about capturing ground so that they could declare the offensive over and hold to conserve manpower; the problem then was that the only defensible ground was the high ground in very difficult terrain, which the French held very strongly. So the Germans attacked and attacked, because the 5th army's leadership was so wedded to holding ground that they had taken, so they wouldn't retreat to defensible ground to the rear and instead focused on moving forward to get the necessary ground. In the meantime the French had full observation of German positions so could hit them whenever they formed up to attack or just for yucks. Still, Germany managed a favorable kill and casualty ratio, but not by nearly enough margin to justify the cost.
Germany couldn't sit on the defensive in the West, because Falkenhayn would have had to have a totally different personality for that to work, changing everything up to this point. Also if the Germans stayed on the defensive in the West then they would get hit very hard come August when the Somme offensive was originally planned for. The British would be much better prepared and the French would have an extra 300k+ men to contribute to that battle. Being on the receiving end of so much artillery and Entente manpower simultaneously would have broken the German army, especially if the Brusilov offensive still goes through.
Verdun was better than the alternative and it did really break the French army in many ways, creating the conditions for the French mutinies in April 1917. I'd argue staying on the defensive in the West in 1916 would be worse for Germany.
Overall the best situation is the 5th army to stick to the freakin' plan and bleed the French out at Verdun without sticking their infantry into the meat grinder.
The number of Germans killed and missing was about 80,000. - 350,000 is roughly the sum of overall German casualties (dead and missing, wounded, ill). There had to be an offensive action at the Western Front in early 1916, the coming Anglo-French offensive (Somme) had to be pre-empted by weakening the French Army. So, either Verdun, Belfort, or Champagne-Argonne - can't see any of these attacks being less costly, keeping in mind Falkenhayn's peculiar way of not assigning sufficient forces from the start but feeding them into the grinder piecemal and too late.
There was a reason Falkenhayn fed in men slowly, because that played to the original plan; he wanted not to advance quickly, but force the French to hold ground and his infantry to always stay within range of their artillery, thus not exposing their infantry to French guns unsupported. He was going for a rerun of the von Mudra offensive in the Argonne in October 1914, but apparently the 5th army's leadership never understood that and went back to the obsession with capturing ground, to the great cost of their infantry. The Crown Prince screwed up royally and threw away Falkenhayn's plan within the first couple days.