An easy mistake to make - I myself occasionaly pause to think - is it
Britanny or
Bretonia?
Especially when speaking Polish - there the difference is between Bret
onia and Bret
ania
Now,what could happened without any ROB interventions:
1.Putch 1821 averted,traitors killed.Becouse most was masons,masons are purged.
2.Poland fall after 1831 lost uprising - take as many as possible soldiers and modernize army.Including horse artillery and rockets,also ulans as light calvary for keeping borderland safe.
3.Carlist lost war about 1835 - the same,take as many as possible.
4.Do not let protestants and jews come into Texas and New Mexico.
5.About 1845 we would have some skirkishes,maybe even small war - wit by Mexico.In OTL irish soldiers serving in USA army helped mexican,the same could happen here.
Purges of catholics in USA,all catholics go to Mexico.
6.Famine in Ireland - send fleet with grain,and take as many colonist as possible.Since there were 8 millions of irish then,3 millions could go to Mexico.
7.Oregon - in this TL,with weaker USA,it belong to England.
8.1864,another polish lost uprising - take as many as possible.Including prince Czartoryski,considered as uncrown Poland King.Polish goverment in exile - catholic one.
9.Cyvil war - South supported by England win.
10.Sioux wars - there were catholic missionaries there in OTL,american army massacre some from Mexico.
War,Mexico win again,part of territory is theirs with all Sioux serving as border troops.
11.Commancheria taken by Mexico.Commanches as border troops.
12.All catholics go to Mexico,part of protestants and jews to bigger Canada.
13.Japan opened by England about 1870.Later modernization.
14.Hawaii and Okinawa british.Maybe Hokkaido,too and Kurile islands.
15.if there is war about 1890,USA lost it again.
16.Second carlist war - more catholics to Mexico,including rightfull Spain King regognized by Mexico.
17.After 1870 - more catholics from France and Bavaria come.
18.1914 - Confederacy as England ally,North as germans army,Mexico want be neutral,but USA massacre more catholics so they have no choice and join.
19.1917 - France almost fall,but Japan and Mexican corps save them.
20.1918 - german offensive stopped,germans blocked,USA capitulate.
21. 1919 revolution in germany,end of war.
22. 1920 - German state disbanded,Bavaria and other states free again.Poland as catholic Kingdom,soviets crushed - few russian states.
No unifed german and russian states,no powerfull USA - Happy End.