Question:

Units that are disrupted are ½ defense.

Units that are out of General Supply for 2 turns are ½ defense as well.

The rules do not address units that are both U-2 and disrupted. Are they ½
or ¼?

Answer:

Most Europa rules have a rule that explicitly says that all modifications to the strengths of a unit are cumulative. The Narvik ruleset seems to lack that rule; however, there’s nothing that says the modifiers aren’t cumulative, either. Common sense says that they should be cumulative, so provisionally we’ll go with that, but I will flag this question to be
review by the errata group.

Note that German units on the 2rd and later turns out of supply have their defense strengths reduced to zero rather than halved per Rule 11A2c, last sentence.

Source:

Posted by David Stokes on the Yahoo Europa Mailing list on 16.08.2013 05:30.