Most commands in OFP take specific arguments. Some work on groups, some on loons and so on. Some can take either. In addition there are other commands which take a loon as argument but affect the whole group.
There's no point in attempting to use a command unless you fully understand what arguments it requires. The comref is very helpful on this point. Simply substituting a group for a loon and hoping for the best does not work often enough for it to be a worthwhile technique.