The post you referenced [x].

Thank you and sure thing!

America:

When he occupies Rome during WW2, he treats the Italy brothers as
friends rather than enemies [x]. 

Italy:

He makes temporary peace with France and asks not to fight
when they get shipwrecked during WW2.

Source: Volume 3, United States of Hetalia 2

He calls upon Santa (Finland) so all parties could stop
fighting and enjoy Christmas.

Source: Volume 1, 🙂 in the World.

He opts to reside with Germany as a [euphemistic-style] POW. When
asked why he doesn’t try to escape, he explains that he would prefer not to
fight.

Source: Volume 1, Axis Powers.

He doesn’t hold grudges against anyone regardless of
political conflicts.

Source: Volume 6. 

England:

He makes a temporary truce with Germany on Christmas (WW2).The two play soccer together. 

Source: Volume 3, A Battlefield’s Kickoff.