Hello.

If I were to send 1 billion US dollars worth of goods back in time to Caesar's Rome, in order to strengthen the Roman empire and increase the likelihood of avoiding it's fall, I would send the following:

* Urea / 400,000 tonnes / $230M
* AK-47, 7.62×39mm calibre, 30 round magazine / 100,000 rifles / $100M
* 7.62×39mm rounds, FMJ, brass cased, packed in boxes of 20 / 100M rounds, 2.5M boxes / $100M
* Amoxicillin (penicillin) tablets, 500mg, packed in boxes of 20 / 100M tablets, 5M boxes / $100M
* M224A1 HE shell / 200,000 shells / $70M
* Monoculars / 500,000 / $50M
* M67 fragmentation grenades / 1M / $50M
* Gold bar 100g / 2,000 / $30M
* Silver bar 100g / 90,000 / $30M
* Copper bar 1kg / 1.4M / $20M
* Tin bar 1kg / 400,000 / $20M
* Solar generator, 1x1m / 100,000 / $20M
* M224A1 mortar / 2,000 pieces / $20M
* Stanley Torch, 500 lumen, rechargeable / 500,000 / $20M
* Eye glasses, evenly distributed from +10 to -10 / 500,000 pairs / $15M
* GM rapeseed / 25,000 tonnes / $12.5M
* Flares, various colours / 600,000 / $12M
* Entrenching spades / 200,000 / $10M
* NATO IFAK first-aid kit / 200,000 / $10M
* Fleece blankets, wool and polyester blend / 200,000 / $10M
* Fishing net, 200m depth / 25,000 / $10M
* Nintendo 3DS, with charger / 50,000 / $10M
* Haribo gummies, packed in 1kg boxes / 500,000 / $10M
* Power drill / 200,000 / $10M
* Paracord / 15,000km / $9M
* GM wheatberries / 25,000 tonnes / $6.25M
* Rucksacks / 200,000 / $5M
* Books, assorted, contemporary era, in Latin, 50 copies of each / 100,000 total books / $3M
* Polyester NATO t-shirts / 200,000 / $3M
* Cloth, cotton / 100 tonnes / $3M
* Terrain maps / 200,000 / $2M
* Compass / 200,000 / $2M
* Metal canteen / 200,000 / $2M