The Teutonic Knights and the Coalition have declared an Alliance.
No aggression will be shown to either side from one-another.
Both parties promise Open Borders in all NA Territories and safe-passage.
Both parties promise Trading Rights in all NA Territories.
Both parties promise Full Roster Support whenever possible, and to help and aid one another.
This doesn't sound like an act of war with coalition's enemies as far as a I can tell. Its a free trade agreement, non-aggression pact, and mercing for each other. They are not actually contributing troops, gold, equipment or attacking each others' enemies. Not sure how this is the bad move all of you are saying, since they are at peace with all Coalition's enemies while allowing coalition to do free trade and help with filling the roster of a small faction.
Anyone attackign them would be the same as declaring war on anyone witha member who mercs against you, which would quickly add up to a huge number of enemies.