What is the meaning of the uniting of the Russian Orthodox church? Why was it disconnected?

Answer 1

The Russian Orthodox Church encountered problems under Czar Peter the Great who interfered with the Russian Orthodox Patriarch. The divisions worsened in 1917 when Communism took over and confiscated church property, land and money. Meanwhile, new churches were being found in the USA and other countries. The church in the USA had her own leadership (which is now the Orthodox Church in America) which clashed with the Russian Orthodox Patriarch. After decades of struggle, the two churches finally agreed to reunify.

Answer 2

I'm not sure about this, but I think the Church split during communist times into the Russian Orthodox Church of Russia and the Russian Orthodox Church in other countries (not sure what it's called in English). I think they split because the Church that was in Russia collaborated with the communists, so all the emigrants got mad about that...
But now they're uniting, so YAY.

Answer 3

Here's an over simplified summary. Up until around 1000 A.D. there was only one Church on earth. There was a political division in the Christian world at that time which resulted in two emperors, one in the east at Constantinople and one in the west at Rome. As is usual with politics the two sides began bickering and fighting, and this fighting culminated in the sack of Constantinople. Since then there have been two main Churches, the Catholic and the Orthodox, but they are so similar that reunification is a very real possibility. They both trace their authority back to the first pontiff, Peter.

Answer 4

They split over the definition of the Trinity.
Orthodox believe Jesus the Son, is subordinate to the Father.