Good job !
About writing Unicode, I have used the Antioch program, which is sadly not free. But you can dowload here
a slightly downgraded version for free (and you will be reminded that "you are using an unregistered version" each time when you close down the program...)
Regarding your work, you will see I added some nu movables. I replaced also some acute accents with grave accents according to the rules.
1. Cyrus sent gifts to the generals.
Îšá¿¦ÏÎ¿Ï‚ Î´á¿¶ÏÎ± Ï„Î¿á¿–Ï‚ ÏƒÏ„ÏÎ±Ï„Î·Î³Î¿á¿–Ï‚ á¼”Ï€ÎµÎ¼Ï€ÎµÎ½. (single accent on Î´á¿¶ÏÎ±)
2. He led the horse into the river.
Ï„á½¸Î½ á¼µÏ€Ï€Î¿Î½ Îµá¼°Ï‚ Ï„á½¸Î½ Ï€Î¿Ï„Î±Î¼á½¸Î½ á¼¦Î³ÎµÎ½. ("led", not "sent")
3. The general had ships of war (lit. â€œlong shipsâ€).
á½ ÏƒÏ„ÏÎ±Ï„Î·Î³á½¸Ï‚ Ï€Î»Î¿á¿–Î± Î¼Î±ÎºÏá½° Îµá¼¶Ï‡ÎµÎ½. (Note the grave accents)
4. We are sending the wine to Cyrus.
Ï„á½¸Î½ Î¿á¼¶Î½Î¿Î½ Îšá¿¡Ïá¿³ Ï€á½³Î¼Ï€Î¿Î¼ÎµÎ½. (circumflex on Î¿á¼¶Î½Î¿Î½)
5. The generals sent horses to Cyrus.
Î¿á¼± ÏƒÏ„ÏÎ±Ï„Î·Î³Î¿á½¶ á¼µÏ€Ï€Î¿Ï…Ï‚ Îšá¿¡Ïá¿³ á¼”Ï€ÎµÎ¼Ï€Î¿Î½. (You wrote "we sent")