Why have some historians rejected the labels bc and ad as labels for periods in world history ?

there are hundreds of postives ways to unite a country with another country here are a   few

1 peace treaty's peace treatys

are basically a document signing a allliance with one country and another.

2 gift

what i mean by this is for example how the french gave the americans the statue of libery a gift of peace.

according to islamic belief there is only one god and muhammed is god´s messenger.

he was sent to introduce and instruct his people with god´s teachings : the 5 pillars of islamism. these are the five basic acts of islamic religious belief.

number one is the declaration of faith. this means there is only one god and one messenger.

number two is obligatory five prayers . number three is compulsory giving in order to achieve balance and encourage individual growth.

number five is fasting in the month of ramadan and the final number five pilgrimage to the mecca.

it would weaken the prestige of japan’s military.