"Tacit agreement for not fight." Topic

On WWI there had been some anecdots about germans and british troops that made a "secret" and "tacit" agreement" for not fought each other for some time.
Even, they made some "simulation" of fought to chidding the Hight Command of both Armies.

On WW2 there would be some examples too.

Sometimes, at Napoleon Era, specially on the colonies or in South America, there were some of this agreements between soldiers on the first line too.

Wonder to know if there would be some similar situations of Rebel and Union soldiers decided not to fight for some time as on those other wars.

Thanks in advance for your information.
Amicalement
Armand

There were, as I recall, occasions on campaign when Union and Reb troops would meet at the edge of a picket to exchange things – tobacco (Reb) for coffee (Yank) was apparently quite common – common enough that there are woodprints from the Civil War showing exchanges – as an aside, the Union army was probably the first army to be very well supplied with coffee, from the USCC

Here is some text about it

link

It happened a lot, from what I have read.

Where did you get your inspiration for Princess Purnah, Howard?

Allen

Such aggreements were usually not in effect between Confederates and Black Union troops.

Ah see Gen'l Gordon gots him a cute story about about a loyal an' uneducated slave.

As the war progressed a certain "live and let live" attitude grew among the soldiers. They would fight in battle, but they saw no point in trying to kill each other at other times. There are a number of memoirs and diaries that are particularly critical of the sharpshooters and snipers. They felt that such activities did nothing to advance the cause of the war and were little better than murder.