Istanbul landbridge is broken.

[L-laine]

There's a land bridge yet my troops won't cross it to reach the land on the other side instead they try to go all the way around. The only time they've actually went through the area is when there was a battle plan with an offensive line far on the other side that ended at hungary. Is the land bridge are glitched for anybody else?

[Sohei]

You mean crossing the Bosphorus Strait? I was able to cross it as Turkey without any trouble. Didn't try attacking across it though.

[jedi72]

Maybe your enemy has a navy fleet blockading your crossing??

I have yet to experiment this situation, so just wondering..

[Zuul]

https://forum.paradoxplaza.com/forum/index.php?threads/hearts-of-iron-iv-development-diary-56-bits-pieces.930457/

As long as you're in control of both sides of the strait, you can move armies across it just fine. Just loaded up Turkey to check.

If you've lost control of one side of the strait, you're ♥♥♥♥ out of luck and will have to use a naval invasion or go around.