An Alternate World War for The Netherlands.

Yes, but there they to can't really agree on how to achieve Independence, what form of government they are going to have, what their relationship is going to be With other countries, what Language they are going to speak etc. etc. Some of this fighting is delibratly kept going, it has been speculated that the vast majority of Indiesche Vrijheid Partij are actually undercover MID agents attacking the opposistion.

Part V: The Sun Rises on a New Asia.
“The marines are the sword and everyone else is a distraction. If the sword fails then clearly the distractions are not doing their job good enough.”
Major Johan Ording.

While the French and British were on the offensive in Europe, the Dutch were on the offensive nearly everywhere else. Dutch troops from Indonesia and Java landed in French Indochina while the vast Indian army invaded Burma. Even the Mughal empire and kingdom of Nepal declared war on the Allies and deployed an expeditionary force each. They served with distinction.
In Africa, Abyssinia was quick to blockade the Suez channel while the Boer Republics began a general mobilisation of their forces. Plans were already in place to invade Algeria and Libya and use their airbases for a bombing campaign of Europe.
Perhaps the greatest Dutch success at this stage was the bombing of Pearl Harbour on the Sandwich Islands, home to much of the Axis Pacific fleet. Taking off from the carriers Vrijheid, Overwinning, Onafhankelijk, Onderneming, Wesp and Horzel, naval bombers successfully sunk or damaged most of the Axis Pacific squadron in port.
An hour later royal marines established a beachhead and began pushing inlands, supported by the gunfire of sixteen destroyers. After two weeks of heavy fighting the British troops scuttled their remaining ships and surrendered.
Mosley’s hopes for a Pacific raiding campaign would effectively die there.
By the beginning of 1941, this situation was repeating itself across French Indochina and the Philippines as well. The Royal Indonesian Air Force achieved air superiority in February and under their cover marshal Jan de Vos’ 5th army gradually conquered much of French Indochina.
Not to be outdone by the army, the marines and navy cooperated to invade the Philippines. Unfortunately, their cooperation ended there. The navy set off quickly to find and discover the remaining Axis ships in the area, the army regularly accused the marines of using them as a meatshield and the air force of never arriving on time.
The inter-service rivalry grew nearly outright hostile at times, with the army hoarding all the tanks because “they needed them more” and the marines hoarding almost all the artillery in revenge. An attempt by the air force to mediate instead ended up turning the entire argument into a brawl that forced the military police to intervene. After that nobody wanted to cooperate anymore.
Despite the rivalry going on behind the scenes, the Dutch gradually pushed the British back from all of the main islands, but at a heavy toll. Of the initial landing force of fifty thousand troops, only a third would still be in fighting shape at the final victory.
The Bataan Death March would go on to stand as a dark example of what inter-service rivalry could lead to and be used as one of the reasons for the creations of the joint chiefs of staff in 1953. But the grudges created during that campaign have neither been forgotten nor forgiven.
For a time, it looked like the war in the East would be over soon and the Commonwealth could focus on Europe and North America. They were sorely mistaken.
With a fuel crisis on the horizon and the very real possibility of being walled in by Dutch military bases, the Japanese started their own invasion of French Indochina in March. With the defences focused southward to ward of easily punching through what remained of the French defences and reaching Saigon within days. In the battle of Saigon the overstretched 5th army was soundly defeated and forced to retreat post haste, the IJA in hot pursuit the entire time. The situation was worse on Formosa, where the Air Force was fighting tooth and nail to hold back Japanese bomber fleets while the army barely repulsed a landing force. What hope Formosa had of salvation would be shattered when Force F was ambushed and lost half its ships to Japanese torpedo bombers. With the loss of their trump card, the battleship Koningin van Ceylon, vice admiral Veldstra decided to retreat back to safe waters. He failed. Before they got very far, Force F was attacked and destroyed by the Nagato and her destroyer escorts.
Similarly, an attempt by Force W to stop an invasion of the Philippines ended in the loss of the Horzel and the Wesp suffering heavy damage.
The next day a general retreat order was issued to all Allied naval forces, command had decided that losing Formosa and Hainan was preferable to losing any means of fighting back.
On land, the Imperial army encircled the Dutch 5h army and defeated the 7th and 10th army, forcing them to retreat. March, 1941 is often considered one of the darkest times in modern Dutch history with military casualties reaching in the tens of thousands.
And the world war had only just begun.

Actually, given how TTL Dutch Commonwealth is very much a maritime super power and has the power projection capabilities that come With it, I would say it is slightly larger then OTL US marine corps.

Yes, like the army, the corps of marines doesn't really care if you have a higher education or not and thus tends to recruit its members from all nationilities and walks of life. The 43th division (based in Abyssinia, is most known for it, With its motto being "Everybody under the sun". This has unfortantly also led to marines commonly being stereotyped as criminals and thugs, especially by the other branches of the armed forces.

The 43th is marines and proud of it (hoorah!). But the stereotype has widely adopted by the marines themselves, who typically answer "that means at least we can fight our way out of a scrap".
The other stereotypes are:
The navy is full of aristocrats and gloryhounds (With it being the most prestigious service, many Rich People send their son there for prestige).
The army is full of idiots and is the dumping ground for all the other branches (it has the lowest required qualifictions so even if you fail to get into an other service, you may be accepted here).
The Air force is full of slackers and romantics (eight hours of sleep is mandatory and most only join so they fly a plane).

They do perform well when they are seperated, it is the Axis who are suffering from crippling problems because of the services constantly trying to one-up the other.