The first sentence of this was a breeze to translate with no reference to dictionary or notes. Alas, that gave me a false sense of security, and so I had to go to another translation to untangle what was going on with the cavalry. (It doesn't help that certain comparative adverbs look strikingly similar to singular nominative adjectives, so I kept ascribing things to Caesar instead of dudes on horses.) The first time around I thought Caesar was deliberately trying to encourage them to attack his men on bad ground--that is, bad for cavalry--which seemed unlikely.
1.15.1 On the following day they moved their camps from that place. Caesar did the same thing, and sent ahead the whole cavalry, numbering about four thousand, which he had gathered together from the whole province and from the Haedui and their friends, so that they could see where the enemy was going. Being too eager, they caught up to the rear of the army on unfavorable ground, and joined battle with the calvary of the Helvetii; and few of our men fell.
1.15.2 And the Helvetii, encouraged by this battle--because they overcame so great a horde of cavalry with five hundred horsemen--began to often quite boldly halt and harass our men with battle at the rear of the line. Caesar held back his own men from the battle, and considered it sufficient for the time being to hold off the enemy from plundering, and from ravaging the supplies.
1.15.3 Thus they traveled for about fifteen days, so that there remained between the enemy's back lines and the front of ours a gap of no more than five or six miles.
1.15.1 On the following day they moved their camps from that place. Caesar did the same thing, and sent ahead the whole cavalry, numbering about four thousand, which he had gathered together from the whole province and from the Haedui and their friends, so that they could see where the enemy was going. Being too eager, they caught up to the rear of the army on unfavorable ground, and joined battle with the calvary of the Helvetii; and few of our men fell.
1.15.2 And the Helvetii, encouraged by this battle--because they overcame so great a horde of cavalry with five hundred horsemen--began to often quite boldly halt and harass our men with battle at the rear of the line. Caesar held back his own men from the battle, and considered it sufficient for the time being to hold off the enemy from plundering, and from ravaging the supplies.
1.15.3 Thus they traveled for about fifteen days, so that there remained between the enemy's back lines and the front of ours a gap of no more than five or six miles.