Shadowproxima, position the snipers on the rooftops as shown and send "you" to the hospital at the right moment.
On your return, you can use the sniper decoys to distract the bugs.

how do you get to the station and kayla without dying! no army help only have officer too many bugs please provide help

@Margo

Oh!
I got it!

thank you for solve my question.

Finally I finished this mission.

very nice map i enjoyed time

Clarification:
I don't like overly linear scenarios where you can't go where you want and take initiative.
My maps always offer the possibility to explore and take initiative. I spend a lot of time making this possible without it compromising the main storyline.
For me, problems like insects getting stuck provide an opportunity to mount a commando operation to resolve the situation.
That's my choice; I hope you understand.

Hello tonyxfg and thank you for your comment.

To answer your questions:

1. It's easy to eliminate the Hornet tanker by going through the airport radio station if you wish, or as you did, take the opportunity to stop the western wave while waiting to finish the southern wave.

2. It depends on whether you eliminate the hive or not.

3. You must raise the flag on top of the Plaza Hotel to validate the victory.

It's a great and fun mission!

not too easy but also not too difficult.

we have enough troopers to defend base.

but it seems have some problems.

1.In final base defense, 1 hornet tanker from western gate very easily be stuck at airport's Anti-aircraft missiles position.

it didn't disappear after 4 minutes.
so I decide ignore it, defend south gate first.
after all waves over(south gate), the wave of western gate still stop at wave 7, and that hornet tanker still at there.

2.I don't know why I have to defend police station, I leave some troopers and some turret at police station, but no one come there ever.

3. After defend final waves, this mission still not finish, I should be killed all bugs on the map, but this mission still not complete.

when i killed the gang when it says defend the police station it just froze and has not unfroze its been 5 mins

They came after you cleared the rest of the camp, after you directed them to move to a specific location.
If you move them to the place, then the other will arrive automatically.
If not, there are still some bugs remaining in the area.

they never came when i cleared the entire area

Thanks Lee5wang, normally the trapped insects should disappear after 4 minutes

No Grimmer, they arrive when they need to

so when i started the mission only 3 squads dropped was i supposed to get the flamers and the commander all at once ?

The most interesting map I played recently.
However, the Hornet tanker bug is not a good choice in the final phase.
In each wave, most of the bugs are eradicated; however, due to its large attack range, the hornet tanker remains, and the wave does not end.
So the player needs to go out and finish the last Hornet tanker at every wave.

Without this problem, this map is perfect.