How did a Polish Renault FT-17 end up in the Middle East? The most probable explanation is that it was captured during Polish-bolshevik war or during Soviet invasion of Poland in 1939. Then the Soviets sold it to Afghanistan, which was their ally at the time, and after several years of training duty, it was set on a monument.
Thanks to the effort of Polish enthusiasts and personal involvement of President Bronisław Komorowski, Afghan government agreed on shipping the tank back to Poland. In October 2012, it was carried by military cargo plane to Krzesiny Air Base and then brought to Land Forces Training Center. As of now, it's the oldest tank to serve in Polish colours and the oldest tank on Polish soil.
It is planned that the tank will be restored in Poznan, and then will be exhibited in Polish Army Museum in Warsaw (altough some people claim it should stay in Poznan, as it is the birthplace of first Polish armoured units - after WWI Renault FTs brought from France were grouped there, on Biedrusko shooting range).
On December 27th 2012, on the 94th anniversary of Greater Poland Uprising, the tank was set in front of National Museum to be exhibited to anyone interested in seeing it as it was brought to Afghanistan, after almost 100 years on foreign soil.
EDIT: the tank was restored surprisingly fast - it was already rolling during 2013 Independence Day parade in Warsaw
That is amazing!