Heat vegetable oil in a large skillet or paella pan. Cook chicken and pork until browned, then set aside.
In the same pan, cook onion, bell pepper, and garlic for 5 minutes.
Add rice and cook for 2 minutes, stirring constantly.
Stir in chicken broth, peas, carrots, tomatoes, olives, capers, raisins, and white wine. Bring to a boil.
Add saffron threads, salt, and pepper. Return chicken and pork to the pan.
Reduce heat to low, cover, and simmer for 30-40 minutes, stirring occasionally.
Remove from heat and let sit for 5 minutes, covered.
Serve hot, garnished with additional olives or chopped parsley if desired.