Argent Vanguard is the first camp of Argent Crusade, Tirion Fording is here. There is a Flight Master, but no Inn.
Arrived at Orgrim's Hammer, Turn in 1, accept 2 and "It's All Fun and Games". Carry with quest 2.
Turn in 3, and accept 4.5.6, do them together.
Turn in 4.5.6, and accept 7.
Turn in 11, and accept 188.8.131.52.
Do 12.13 together.
Do 14.15 together.
Turn in 184.108.40.206, and accept 16.17 .
Turn in 16.17, and accept 18.
Turn in 20 and accept "A Tale of Valor", opening quest line A Hero.
Note: 20 is one of the two quests to trigger "Orgrim's Hammer "
to begin quest line Arthas. The other quest is "Free Your Mind" that you can accept later.
After the battle, Crusaders' Pinnacle will be built up, there are Inn and flight master. Pack your stuff then move to the next stop The Shadow Vault.