During the Six-Day War in 1967, the canal was closed. Egypt kept it closed until 1975, trapping 15 ships in the lake. These ships became known as the "Yellow Fleet", because of the desert sands which soon covered their decks. The crews of the ships would eventually organize, share resources, and later set up their own post office and stamp. Two German-flagged ships eventually sailed out of the canal on their own power. Stranded cargo included various perishables (such as eggs and fruit), T-shirts, and a load of toys destined for Woolworth's.