@Findell_HOI
This is Germany in 1940. Historically that's six companies
I haven't even researched Marines; not a priority
The
Marine-Stoßtrupp-Kompanie was formed in March 1938.
[6] It initially consisted of two infantry platoons, one engineer platoon and one weapons platoon with a total strength about 250 men. On 1 September 1939, it took part in the
Battle of Westerplatte.
In 1940, the unit was expanded to six companies as
Marine-Stoßtrupp-Abteilung. The formation participated in the occupation of Normandy and the
Channel Islands.
In 1945, a number of Navy sailors were sent to fight in the
Battle of Berlin by order of Grand Admiral Dönitz, while thousands were organized into infantry formations. Those included the
1st Naval Infantry Division and
others.
As for the rivers my plan was to punch through the Dutch armies North of the Nederijn and go for Amsterdam, also between the Waal and the Nederijn and go for Rotterdam. Once through the Dutch blocking forces some divisions would head on for those objectives and others would head South; Arnhem, Nijmegen and on to Brussels and Northern France.
Hung up on the border for like 10 - 12 days. Apparently although my advance is parallel to the rivers my attacks are treated as being across rivers and the defenders get bonuses for defending bridges. Perhaps the rivers slow things down, but that is not the only factor. Historically the Germans went through the Ardennes. A surprise move that isn't possible / practical in HOI4, similar to the way that Pearl Harbour never happens. Then the cities are treated now as fortresses, which didn't used to be the case, despite the fact that in 1940 those cities were not fortresses and it was only as the war progressed that ways were developed to fortify cities.
So what used to work no longer works.
And what the heck, I would probably only play to the Fall of France anyway as it's baked in that Mussolini will declare war on Switzerland asap, for no other reason than that the AI can.