Why don't we just have 1 sas sqd in each theatre of conflict, or province,problem solved!?

Each unit should be self supportive, relying on their country of origin ( intelligence, air support, logistics. ) ****! With all this weaponry and training, these guys can handle it, they love it, they want it, they joined to do this ****. All this complicated structure from the seppos, total mess like vietnam, no lessons learnt. God! the enemy still has no air force etc and it could be over so quickly, just send 1 Gurkha battalion in with no political correctness. The bloody yanks, involve the whole world to fight 1 small group ( in comparison ) , look at england in the falklands war, no bullshit, no help, just straight into it, warriors!