Dative of purpose

Latin Learning Latin
1

I just want to clear something up.

Oberg in instructions for Part II of LLPSI discusses the dative of purpose and gives the following example:

Aedes Castoris consecrata est diis Castori et Polluci, Iovis filiis geminis, qui Sapius Romanis in proeliis auxilio venerunt. (1.140)

…drawing our attention to ‘auxilio venerunt’ only. BUT what about the other datives in this sentence. ‘Romanis’? ‘proeliis’ ? are these part of the dative of purpose…?

Aedes Castoris consecrata est diis [dat] Castori [dat] et Polluci [dat] , Iovis filiis [dat] geminis [dat] , qui Sapius Romanis [dat] in proeliis [dat?] auxilio [dat] venerunt. (1.140)

Literaly they came TO the help etc…

A lot of datives. Are they all dative of purpose…?

2

Minimé. Objecti indirecti est alibi dativus casus.
No. They (the others) are dative of the indirect object.

Sapius [sic] = saepius (quite/pretty/relatively often)

in proeliis [ablativo]

3

gratias tibi ago

4

gratias tibi ago

5

It would be helpful if you check the words whether they are singular or plural.
Usually a singular word and a plural word work separately in a sentence.
So auxilio and romanis proeliis work separately.