Campaign question

[gord96]

Hey all. Very fun game. Have a question on the campaign.

How long does it take to 'lose' it? I ask as I did a few missions with success but then when I was right next to Murmansk, I rec'd orders to go fire 10 missiles at the port. Problem was I had no missiles as my previous mission was sub hunting. So I had to head back to base and by the time I got there and headed back I got 2-3 messages about the Soviets winning the war. I am guessing because I wasn't completing any missions during my transit to and from Murmansk. By the time I got back Germany had surrendered.

Seems a bit odd that the entire war effort hinges on my one sub so curious if they are related to my effort or if those are just standard messages?

Thanks for any info!