you have to distinguish  Belgium did not take part at the start because it took them some days to get ready for the mission But it pledged its units at the summit To say it was not part is factually wrong As you say  initial assault was just  nations but only because time was of essence and the other nations had to get their units in position first The coalition included from the start Qatar but they needed some days to get their plans to the theater of operations About the de Gaulle  agreed take it out But do not say it was a  nation coalition this is an error