Complex sentence: Greece has major problems to fullfil the payments of their military projects-for example the greece order of Leopard 2 tanks where germany delivered 100 tanks (until 2007) but greece just payed 20 tanks and delayed payments of the other 80 tanks.
Split into simpler sentences: Greece has major problems to fullfil the payments of their military projects-for example the greece order of Leopard 2 tanks. Germany delivered 100 tanks (until 2007) but greece only payed 20 tanks and delayed payments of the other 80 tanks.