However, Morocco had invaded the Territory in 1975 and the Frente POLISARIO had then resisted so fiercely that Morocco had been forced to sign a ceasefire agreement in 1990.
然而，1975年摩洛哥侵略了西撒哈拉。 波利萨里奥阵线坚决抵抗，并迫使摩洛哥于1990年签署了停火。