What are two examples of the gods interfering with the war?

You could argue that before the story began, the Trojans
had already received the help of Poseidon in building their wall, but thanks to their
lack of tribute he had withdrawn his protection, so perhaps that could be example number
one.

Of course for another you need look no farther than
the false dream sent to Agamemnon that suggested he would be able to capture the city in
one night if he only raised the army and sent it along to
Troy.

A third would be the fact that Aphrodite saves Paris
from death and whisks him away to the safety of his bedroom in
Troy.

But if you need more, it doesn't take much looking
through the story to find them, the gods couldn't keep their hands off of this
one!

After a lull in the fighting and exhaustion on both
sides leads to a truce, Hera schemes with a group of other gods to break the truce, we
can't have this boring peace now can we!

Very soon
thereafter, Diomedes comes whipping through the battle rampaging through various groups
and killing and wounding a huge number of combatants.  According to the
summary:

He
even wounds the goddess Aphrodite when she tries to rescue her son Aeneas, and the war
god Ares, when he tries to rally the Trojan forces. (Note:
“aristeia” is a Greek word which means “excellence” and here refers
to an episode in which a particular character demonstrates exceptional valor or
merit.)

Later on in the
battle Zeus and Poseidon both help the Achaeans protect their ships from the marauding
Trojans intent on burning them.

Basically, if you read the
story, you can't help but run across gods interfering, without them, the Trojans and the
Achaeans would have been drinking together on the beach for a few weeks instead of
fighting this incredibly battle.