Germany OTL obviously took quite an aggressive strategy, invading neutral Belgium to get to France. Now what could change TTL that might make them decide not to do so, staying on the defensive? Imo this leads to a German victory since Britain doesn't have a casus belli to the same extent as OTL, leading the Germans to win in the east quicker, until they're able to beat off the French too. Well, what could make such a change in thei strategy possible?