I don't think it would

I also worked for a long time with KFOR NATO in Kosovo, 35 (at the time give or take) different nations (not all NATO members) working together to maintain peace in that part of the world. The General Officer Commanding used to alternate annually between Germany, France and the Italy, his/her political master is the Sec Gen of NATO.

If this v v lot can work together successfully (relative peace in the region since 1999 suggests it has been) then I reckon a European Force could do the same.

Contributing NATO countries:

Albania (10, joined 2009)
Bulgaria (11)
Canada (1,470 – now 5)
Croatia (20, joined 2009)
Czech Republic (97 – now 9)
Denmark (308 now 35)
Estonia – (122 – now 1)
France (7,000 – now 0)
Germany (8,500 – now 250)
Greece (1,000 – now 118)
Hungary (223 – now 197)
Italy (5,000 – now 600)
Lithuania (30, now 1)
Luxembourg (23 – now 0)
Montenegro (2, joined 2017)
Netherlands (3,600 – now 0)
Norway (2,300+ – now 4)
Poland (800 – now 230)
Portugal (now 4)
Romania (62 – now 60)
Slovenia (316)
Turkey (752 – now 402)
United Kingdom (7,000 troops – now 30)
United States of America (19,000 – now 621)

Contributing non-NATO countries
Armenia (35)
Austria (561 – now 450)
Chile (10)
Finland (395 – now 11)
Ireland (279 – now 12)
Sweden (1,100 – now 2)
Switzerland (220 – now 219)
Moldova (45)
Ukraine (1,300 – now 40)

Withdrawn countries
Morocco (170 – now 0)
Spain (1,712 – now 0)
Belgium (1,100 – now 0)
Latvia (20, now 0)
Iceland (5 – now 0)
United Arab Emirates (1,500 – now 0)
Russian Federation (4,000 – now 0) (w**kers)
India (800 – now 0)
Bosnia and Herzegovina (550 – 750 – now 0)
Argentina (200, now 0) – 2,000 to presentHospital (ret) + Combat Engineer company
Georgia (country) Georgia (182 – now 0)
Mongolia (40 – now 0)
Azerbaijan (34 – now 0)
Malaysia (? – now 0)
Philippines (457 UNMIK CivPol only – now 0)
Slovakia (0)

Given the rise and fall of Islamic State during this period and the ethnic mix in that part of the world, I'd say that was/is quite successful.

Posted By: Tombs, Mar 23, 15:12:00