How can I pass the Norway campaign in glory of generals?

Note: If this came in very late and you have already accomplished this, then all I can say is... Superb work Commander!

What I did was rush all my land units into the open land west of Kristiansand (of course be mindful of your troops health and the enemies' units) while my naval units took care of the small German navy.

Dietrich commands a heavy artillery unit so take advantage of it blind spots.

Once you capture Kristiansand and remove all the immediate German forces, move all your troops west except your remaining infantry and APC (if they're still alive) to support your allies. By now, they probably have weakened the enemy front so it shouldn't pose too much a threat.

Make sure that you don't forget about your Eastern Flank and strengthen it with a lot of Armoured Infantry.

Meanwhile, send your navy up the straight (?)/ river(?) towards Oslo and just concentrate on taking the port. Again, be mindful of the enemies' units and utilize your ships ranged advantage.

After you capture Stavanger, you move North with your Mechanized Death (sorry, couldn't help myself) and
capture the oil field for more production.

By this time, you probably have enough Armoured Infantry in your Eastern Flank and probably have captured the Oslo Port. Send your Infantry Army North also. Have most of them surround Greim and wreak havoc on him while the others remove the other support artillery near Oslo.

Back to your Western Flank, you should split your Mechanized Force to capture both objectives (Bergen and a level 3 City). Have your Commander and your heavy artillery go against the level 3 city protected by Model's Heavy Tank while the rest go further West to capture Bergen.

Kulle would most likely be 'dead' already so your only problem is the funneled land entrance. You should probably get more artillery from the factory that you captured to support your Western Flank first before getting Heavy Artillery to help defeat Model.

This is the final stage/phase of the operation. Any additional moves you may do is entirely up to you.

If this strategy is executed effectively and given that you don't stupidly rush in like an idiot (Cause frankly, it is idiotic in this mission), then you can achieve 5 stars even without another commander.

Hopefully this helps if not you, then other people in this game.