That’s the funny thing about the differences between 41’ and 42’. My policy was always to not attack Egypt in either of the two scenarios because it was a waste of ground units when you can just load up Libya and the push the UK out with the threat of a superior attack on turn 2 without having to risk sending units into a 50/50 battle on turn 1 and your opponent rolling a yahtzee on defense.
But then I took a hard look at 41’ and realized that you HAVE to attack Egypt with Germany. And you can’t half a** it either. You have to bring the German bomber because the UK fighter MUST be detroyed even at the expense of the German bomber. The reason for this is because of the 3 bomber purchase by the UK that I’ve seen somebody else advocate.
If anything in Egypt survives, the UK can move those units to Trans-Jordan and build the 3 bombers on their turn. That gives them 4 bombers and a fighter to hit the Italian fleet on UK2 and provides them with a place to land in Trans-Jordan that Germany can’t get to on G2 to stop it.
Even if all you get is a cleared result from the German Egypt attack, on Italy’s turn they can take Egypt with their 2 Libyan inf and hit the 2 UK inf in Trans-Jordan with 1 inf, 1 arm, 1 CA, 1 BB which is fairly good odds to take both and remove the landing places for the UK bombers.
Note: this also requires that the Japanese sink the UK DD/TP in sz35, so send 2 fighters to that attack and make absolutely sure that those units are sunk. The last thing you need is to send 1 fighter there and trade the DD for the fighter and have the TP survive to land 2 more units into Trans-Jordan.
In the 42’ scenario they can’t do it because the UK doesn’t have the income to build the third bomber and the German DD in sz13 can also provide an added measure of protection.
So to answer the question: You don’t have to in 42’, but you must in 41’ and bring the bomber to make sure it’s done right.