Training weapons are still useful. When you begin your fort, it never hurts to have any non miners, woodcutters assigned to squads under the Inactive schedule,(actually the militia) assigned practice weapons. In their free time, they will do individual combat drill. Since it does not matter what value the weapon is, they still gain skills. This is especially nice, when your fort is poor. I like to assign them shields, before weapons. The shield skill is a lifesaver.Putting them on an alert to train, is a waste of time.
Creating a new alert,sets up a new menu on the military scheduling screen, as well as the squad menu screen, that takes priority over both the Active/inactive schedules. In this case, for emergencies.
For example, you have a squad of axe dwarves, set to train 2 months, patrol 2 months, off 2 months, repeat same cycle each year. Also, you have a squad of rookie archers, under the Inactive schedule, just goofing off, and practicing when ever. Being a smart manager, you have set up a civilian alert, where they can go cower in terror somewhere safe. But the axedwarves, and trainee archers need to get to work.
So on the military menu, make a new alert . On the military schedule screen, a new screen will be added, named after that alert. Then give new orders to each squad, what you want them to do,how many to appear, for that alert. Copy and paste that order, for each month of that alert, for the squad. Same for the orders you want the other squad to obey.
If you go look at the squad menu, you now have the options, besides kill/move/active/inactive, will have the option to put on alert which squads you need. So if you activate the alert, if your axedwarves are patrolling, they will obey the alert orders. Once the emergency is over, use the squad menu, to put them back on the Active schedule,according to the schedule they were on previously. When you alert the archers, they will quit cowering in terror, and go to where they are supposed to be during that alert. Use the squad menu to then place them in inactive status, and if its safe, unalert the civvies.
Alerts have the nice quality to activate those under the inactive schedule, to disregard burrow restrictions.
So, in short, use the active/training schedule to assign monthly dutys to your full fledged soldiers. And use the alerts, for emergencys